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Finding the Fourth Proportional to 749.52, 1,123.68 and 402.68

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Solution

The fourth proportional to 749.52, 1,123.68 and 402.68 is: 603.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.52 : 1,123.68 = 402.68 : x
  2. Step 2: Convert to fraction form
    749.52/1,123.68 = 402.68/x
  3. Step 3: Cross multiply
    749.52x = 1,123.68 × 402.68
  4. Step 4: Simplify right side
    749.52x = 452,483.46
  5. Step 5: Solve for x
    x = 452,483.46/749.52
  6. Step 6: Final answer
    x = 603.70

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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.