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Finding the Fourth Proportional to 749, 1,123.49 and 337.65

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Solution

The fourth proportional to 749, 1,123.49 and 337.65 is: 506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    749 : 1,123.49 = 337.65 : x
  2. Step 2: Convert to fraction form
    749/1,123.49 = 337.65/x
  3. Step 3: Cross multiply
    749x = 1,123.49 × 337.65
  4. Step 4: Simplify right side
    749x = 379,346.40
  5. Step 5: Solve for x
    x = 379,346.40/749
  6. Step 6: Final answer
    x = 506.47

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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.