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Finding the Fourth Proportional to 488,654.80, 674,312.52 and 287,411.92

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Solution

The fourth proportional to 488,654.80, 674,312.52 and 287,411.92 is: 396,610.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,654.80 : 674,312.52 = 287,411.92 : x
  2. Step 2: Convert to fraction form
    488,654.80/674,312.52 = 287,411.92/x
  3. Step 3: Cross multiply
    488,654.80x = 674,312.52 × 287,411.92
  4. Step 4: Simplify right side
    488,654.80x = 193,805,456,053.24
  5. Step 5: Solve for x
    x = 193,805,456,053.24/488,654.80
  6. Step 6: Final answer
    x = 396,610.16

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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.