Home / 1,327,720,384.30-1,991,580,576.45-638,972,848.30

Finding the Fourth Proportional to 1,327,720,384.30, 1,991,580,576.45 and 638,972,848.30

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Solution

The fourth proportional to 1,327,720,384.30, 1,991,580,576.45 and 638,972,848.30 is: 958,459,272.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,720,384.30 : 1,991,580,576.45 = 638,972,848.30 : x
  2. Step 2: Convert to fraction form
    1,327,720,384.30/1,991,580,576.45 = 638,972,848.30/x
  3. Step 3: Cross multiply
    1,327,720,384.30x = 1,991,580,576.45 × 638,972,848.30
  4. Step 4: Simplify right side
    1,327,720,384.30x = 1,272,565,913,553,212,416
  5. Step 5: Solve for x
    x = 1,272,565,913,553,212,416/1,327,720,384.30
  6. Step 6: Final answer
    x = 958,459,272.45

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Half scale
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Double scale
Find fourth proportional to 1,327,720,385.30, 1,991,580,577.95 and 638,972,849.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.