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Finding the Fourth Proportional to 636,689.25, 878,755.95 and 364,939.29

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Solution

The fourth proportional to 636,689.25, 878,755.95 and 364,939.29 is: 503,687.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,689.25 : 878,755.95 = 364,939.29 : x
  2. Step 2: Convert to fraction form
    636,689.25/878,755.95 = 364,939.29/x
  3. Step 3: Cross multiply
    636,689.25x = 878,755.95 × 364,939.29
  4. Step 4: Simplify right side
    636,689.25x = 320,692,572,476.28
  5. Step 5: Solve for x
    x = 320,692,572,476.28/636,689.25
  6. Step 6: Final answer
    x = 503,687.74

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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.