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Finding the Fourth Proportional to 749.48, 1,125.44 and 628.68

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Solution

The fourth proportional to 749.48, 1,125.44 and 628.68 is: 944.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.48 : 1,125.44 = 628.68 : x
  2. Step 2: Convert to fraction form
    749.48/1,125.44 = 628.68/x
  3. Step 3: Cross multiply
    749.48x = 1,125.44 × 628.68
  4. Step 4: Simplify right side
    749.48x = 707,541.62
  5. Step 5: Solve for x
    x = 707,541.62/749.48
  6. Step 6: Final answer
    x = 944.04

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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.