Home / 1,327,720,406.80-1,991,580,610.20-638,972,870.80

Finding the Fourth Proportional to 1,327,720,406.80, 1,991,580,610.20 and 638,972,870.80

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Solution

The fourth proportional to 1,327,720,406.80, 1,991,580,610.20 and 638,972,870.80 is: 958,459,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,720,406.80 : 1,991,580,610.20 = 638,972,870.80 : x
  2. Step 2: Convert to fraction form
    1,327,720,406.80/1,991,580,610.20 = 638,972,870.80/x
  3. Step 3: Cross multiply
    1,327,720,406.80x = 1,991,580,610.20 × 638,972,870.80
  4. Step 4: Simplify right side
    1,327,720,406.80x = 1,272,565,979,929,109,760
  5. Step 5: Solve for x
    x = 1,272,565,979,929,109,760/1,327,720,406.80
  6. Step 6: Final answer
    x = 958,459,306.20

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Half scale
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Double scale
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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.