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Finding the Fourth Proportional to 749.56, 1,123.92 and 229.41

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Solution

The fourth proportional to 749.56, 1,123.92 and 229.41 is: 343.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.56 : 1,123.92 = 229.41 : x
  2. Step 2: Convert to fraction form
    749.56/1,123.92 = 229.41/x
  3. Step 3: Cross multiply
    749.56x = 1,123.92 × 229.41
  4. Step 4: Simplify right side
    749.56x = 257,838.49
  5. Step 5: Solve for x
    x = 257,838.49/749.56
  6. Step 6: Final answer
    x = 343.99

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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.