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Finding the Fourth Proportional to 638,588.97, 955,970.82 and 615,878.01

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Solution

The fourth proportional to 638,588.97, 955,970.82 and 615,878.01 is: 921,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,588.97 : 955,970.82 = 615,878.01 : x
  2. Step 2: Convert to fraction form
    638,588.97/955,970.82 = 615,878.01/x
  3. Step 3: Cross multiply
    638,588.97x = 955,970.82 × 615,878.01
  4. Step 4: Simplify right side
    638,588.97x = 588,761,406,239.67
  5. Step 5: Solve for x
    x = 588,761,406,239.67/638,588.97
  6. Step 6: Final answer
    x = 921,972.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.