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Finding the Fourth Proportional to 627,290.28, 865,469.88 and 355,314.96

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Solution

The fourth proportional to 627,290.28, 865,469.88 and 355,314.96 is: 490,226.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,290.28 : 865,469.88 = 355,314.96 : x
  2. Step 2: Convert to fraction form
    627,290.28/865,469.88 = 355,314.96/x
  3. Step 3: Cross multiply
    627,290.28x = 865,469.88 × 355,314.96
  4. Step 4: Simplify right side
    627,290.28x = 307,514,395,793.41
  5. Step 5: Solve for x
    x = 307,514,395,793.41/627,290.28
  6. Step 6: Final answer
    x = 490,226.62

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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.