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Finding the Fourth Proportional to 721,956.98, 996,312.42 and 395,264.54

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Solution

The fourth proportional to 721,956.98, 996,312.42 and 395,264.54 is: 545,471.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,956.98 : 996,312.42 = 395,264.54 : x
  2. Step 2: Convert to fraction form
    721,956.98/996,312.42 = 395,264.54/x
  3. Step 3: Cross multiply
    721,956.98x = 996,312.42 × 395,264.54
  4. Step 4: Simplify right side
    721,956.98x = 393,806,970,387.59
  5. Step 5: Solve for x
    x = 393,806,970,387.59/721,956.98
  6. Step 6: Final answer
    x = 545,471.52

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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.