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Finding the Fourth Proportional to 942.22, 1,412.81 and 748.46

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Solution

The fourth proportional to 942.22, 1,412.81 and 748.46 is: 1,122.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.22 : 1,412.81 = 748.46 : x
  2. Step 2: Convert to fraction form
    942.22/1,412.81 = 748.46/x
  3. Step 3: Cross multiply
    942.22x = 1,412.81 × 748.46
  4. Step 4: Simplify right side
    942.22x = 1,057,428.03
  5. Step 5: Solve for x
    x = 1,057,428.03/942.22
  6. Step 6: Final answer
    x = 1,122.27

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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.