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Finding the Fourth Proportional to 713,397.79, 984,488.72 and 391,100.97

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Solution

The fourth proportional to 713,397.79, 984,488.72 and 391,100.97 is: 539,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,397.79 : 984,488.72 = 391,100.97 : x
  2. Step 2: Convert to fraction form
    713,397.79/984,488.72 = 391,100.97/x
  3. Step 3: Cross multiply
    713,397.79x = 984,488.72 × 391,100.97
  4. Step 4: Simplify right side
    713,397.79x = 385,034,495,082.39
  5. Step 5: Solve for x
    x = 385,034,495,082.39/713,397.79
  6. Step 6: Final answer
    x = 539,719.21

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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.