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Finding the Fourth Proportional to 626.88, 939.59 and 472.31

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Solution

The fourth proportional to 626.88, 939.59 and 472.31 is: 707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.88 : 939.59 = 472.31 : x
  2. Step 2: Convert to fraction form
    626.88/939.59 = 472.31/x
  3. Step 3: Cross multiply
    626.88x = 939.59 × 472.31
  4. Step 4: Simplify right side
    626.88x = 443,770.69
  5. Step 5: Solve for x
    x = 443,770.69/626.88
  6. Step 6: Final answer
    x = 707.90

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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.