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Finding the Fourth Proportional to 942.71, 1,412.17 and 748.04

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Solution

The fourth proportional to 942.71, 1,412.17 and 748.04 is: 1,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.71 : 1,412.17 = 748.04 : x
  2. Step 2: Convert to fraction form
    942.71/1,412.17 = 748.04/x
  3. Step 3: Cross multiply
    942.71x = 1,412.17 × 748.04
  4. Step 4: Simplify right side
    942.71x = 1,056,350.72
  5. Step 5: Solve for x
    x = 1,056,350.72/942.71
  6. Step 6: Final answer
    x = 1,120.55

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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.