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Finding the Fourth Proportional to 627,071.59, 865,231.75 and 381,892

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Solution

The fourth proportional to 627,071.59, 865,231.75 and 381,892 is: 526,933.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,071.59 : 865,231.75 = 381,892 : x
  2. Step 2: Convert to fraction form
    627,071.59/865,231.75 = 381,892/x
  3. Step 3: Cross multiply
    627,071.59x = 865,231.75 × 381,892
  4. Step 4: Simplify right side
    627,071.59x = 330,425,083,471
  5. Step 5: Solve for x
    x = 330,425,083,471/627,071.59
  6. Step 6: Final answer
    x = 526,933.59

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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.