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Finding the Fourth Proportional to 749.74, 1,123.92 and 456.52

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Solution

The fourth proportional to 749.74, 1,123.92 and 456.52 is: 684.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.74 : 1,123.92 = 456.52 : x
  2. Step 2: Convert to fraction form
    749.74/1,123.92 = 456.52/x
  3. Step 3: Cross multiply
    749.74x = 1,123.92 × 456.52
  4. Step 4: Simplify right side
    749.74x = 513,091.96
  5. Step 5: Solve for x
    x = 513,091.96/749.74
  6. Step 6: Final answer
    x = 684.36

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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.