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Finding the Fourth Proportional to 627.39, 939.24 and 505.89

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Solution

The fourth proportional to 627.39, 939.24 and 505.89 is: 757.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.39 : 939.24 = 505.89 : x
  2. Step 2: Convert to fraction form
    627.39/939.24 = 505.89/x
  3. Step 3: Cross multiply
    627.39x = 939.24 × 505.89
  4. Step 4: Simplify right side
    627.39x = 475,152.12
  5. Step 5: Solve for x
    x = 475,152.12/627.39
  6. Step 6: Final answer
    x = 757.35

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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.