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Finding the Fourth Proportional to 721,938.52, 996,283.04 and 399,654

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Solution

The fourth proportional to 721,938.52, 996,283.04 and 399,654 is: 551,526.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,938.52 : 996,283.04 = 399,654 : x
  2. Step 2: Convert to fraction form
    721,938.52/996,283.04 = 399,654/x
  3. Step 3: Cross multiply
    721,938.52x = 996,283.04 × 399,654
  4. Step 4: Simplify right side
    721,938.52x = 398,168,502,068.16
  5. Step 5: Solve for x
    x = 398,168,502,068.16/721,938.52
  6. Step 6: Final answer
    x = 551,526.88

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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.