Home / 721,881.38-996,184.21-399,584.54

Finding the Fourth Proportional to 721,881.38, 996,184.21 and 399,584.54

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Solution

The fourth proportional to 721,881.38, 996,184.21 and 399,584.54 is: 551,419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,881.38 : 996,184.21 = 399,584.54 : x
  2. Step 2: Convert to fraction form
    721,881.38/996,184.21 = 399,584.54/x
  3. Step 3: Cross multiply
    721,881.38x = 996,184.21 × 399,584.54
  4. Step 4: Simplify right side
    721,881.38x = 398,059,809,308.11
  5. Step 5: Solve for x
    x = 398,059,809,308.11/721,881.38
  6. Step 6: Final answer
    x = 551,419.97

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.