Home / 1,327,720,337.55-1,991,580,506.33-638,972,801.55

Finding the Fourth Proportional to 1,327,720,337.55, 1,991,580,506.33 and 638,972,801.55

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Solution

The fourth proportional to 1,327,720,337.55, 1,991,580,506.33 and 638,972,801.55 is: 958,459,202.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,720,337.55 : 1,991,580,506.33 = 638,972,801.55 : x
  2. Step 2: Convert to fraction form
    1,327,720,337.55/1,991,580,506.33 = 638,972,801.55/x
  3. Step 3: Cross multiply
    1,327,720,337.55x = 1,991,580,506.33 × 638,972,801.55
  4. Step 4: Simplify right side
    1,327,720,337.55x = 1,272,565,775,638,852,608
  5. Step 5: Solve for x
    x = 1,272,565,775,638,852,608/1,327,720,337.55
  6. Step 6: Final answer
    x = 958,459,202.33

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Half scale
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Double scale
Find fourth proportional to 1,327,720,338.55, 1,991,580,507.83 and 638,972,802.55
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.