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Finding the Fourth Proportional to 719,387.87, 992,767.43 and 392,717.72

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Solution

The fourth proportional to 719,387.87, 992,767.43 and 392,717.72 is: 541,957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,387.87 : 992,767.43 = 392,717.72 : x
  2. Step 2: Convert to fraction form
    719,387.87/992,767.43 = 392,717.72/x
  3. Step 3: Cross multiply
    719,387.87x = 992,767.43 × 392,717.72
  4. Step 4: Simplify right side
    719,387.87x = 389,877,365,063.57
  5. Step 5: Solve for x
    x = 389,877,365,063.57/719,387.87
  6. Step 6: Final answer
    x = 541,957.11

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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.