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Finding the Fourth Proportional to 627.11, 938.98 and 511.08

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Solution

The fourth proportional to 627.11, 938.98 and 511.08 is: 765.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.11 : 938.98 = 511.08 : x
  2. Step 2: Convert to fraction form
    627.11/938.98 = 511.08/x
  3. Step 3: Cross multiply
    627.11x = 938.98 × 511.08
  4. Step 4: Simplify right side
    627.11x = 479,893.90
  5. Step 5: Solve for x
    x = 479,893.90/627.11
  6. Step 6: Final answer
    x = 765.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.