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Finding the Fourth Proportional to 627,354.28, 865,752.42 and 340,876.72

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Solution

The fourth proportional to 627,354.28, 865,752.42 and 340,876.72 is: 470,411.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,354.28 : 865,752.42 = 340,876.72 : x
  2. Step 2: Convert to fraction form
    627,354.28/865,752.42 = 340,876.72/x
  3. Step 3: Cross multiply
    627,354.28x = 865,752.42 × 340,876.72
  4. Step 4: Simplify right side
    627,354.28x = 295,114,845,261.66
  5. Step 5: Solve for x
    x = 295,114,845,261.66/627,354.28
  6. Step 6: Final answer
    x = 470,411.78

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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.