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Finding the Fourth Proportional to 627,248.28, 865,540.16 and 355,261.90

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Solution

The fourth proportional to 627,248.28, 865,540.16 and 355,261.90 is: 490,226.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,248.28 : 865,540.16 = 355,261.90 : x
  2. Step 2: Convert to fraction form
    627,248.28/865,540.16 = 355,261.90/x
  3. Step 3: Cross multiply
    627,248.28x = 865,540.16 × 355,261.90
  4. Step 4: Simplify right side
    627,248.28x = 307,493,441,767.90
  5. Step 5: Solve for x
    x = 307,493,441,767.90/627,248.28
  6. Step 6: Final answer
    x = 490,226.04

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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.