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Finding the Fourth Proportional to 749.23, 1,033.68 and 454.39

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Solution

The fourth proportional to 749.23, 1,033.68 and 454.39 is: 626.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.23 : 1,033.68 = 454.39 : x
  2. Step 2: Convert to fraction form
    749.23/1,033.68 = 454.39/x
  3. Step 3: Cross multiply
    749.23x = 1,033.68 × 454.39
  4. Step 4: Simplify right side
    749.23x = 469,691.27
  5. Step 5: Solve for x
    x = 469,691.27/749.23
  6. Step 6: Final answer
    x = 626.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.