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Finding the Fourth Proportional to 752.20, 1,128.42 and 232.08

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Solution

The fourth proportional to 752.20, 1,128.42 and 232.08 is: 348.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.20 : 1,128.42 = 232.08 : x
  2. Step 2: Convert to fraction form
    752.20/1,128.42 = 232.08/x
  3. Step 3: Cross multiply
    752.20x = 1,128.42 × 232.08
  4. Step 4: Simplify right side
    752.20x = 261,884.15
  5. Step 5: Solve for x
    x = 261,884.15/752.20
  6. Step 6: Final answer
    x = 348.16

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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.