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Finding the Fourth Proportional to 627.42, 939.92 and 482.43

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Solution

The fourth proportional to 627.42, 939.92 and 482.43 is: 722.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.42 : 939.92 = 482.43 : x
  2. Step 2: Convert to fraction form
    627.42/939.92 = 482.43/x
  3. Step 3: Cross multiply
    627.42x = 939.92 × 482.43
  4. Step 4: Simplify right side
    627.42x = 453,443.19
  5. Step 5: Solve for x
    x = 453,443.19/627.42
  6. Step 6: Final answer
    x = 722.71

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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.