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Finding the Fourth Proportional to 627,070.59, 865,230.38 and 381,891

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Solution

The fourth proportional to 627,070.59, 865,230.38 and 381,891 is: 526,932.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,070.59 : 865,230.38 = 381,891 : x
  2. Step 2: Convert to fraction form
    627,070.59/865,230.38 = 381,891/x
  3. Step 3: Cross multiply
    627,070.59x = 865,230.38 × 381,891
  4. Step 4: Simplify right side
    627,070.59x = 330,423,693,139.13
  5. Step 5: Solve for x
    x = 330,423,693,139.13/627,070.59
  6. Step 6: Final answer
    x = 526,932.21

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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.