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Finding the Fourth Proportional to 1,114.96, 1,669.16 and 748.88

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Solution

The fourth proportional to 1,114.96, 1,669.16 and 748.88 is: 1,121.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.96 : 1,669.16 = 748.88 : x
  2. Step 2: Convert to fraction form
    1,114.96/1,669.16 = 748.88/x
  3. Step 3: Cross multiply
    1,114.96x = 1,669.16 × 748.88
  4. Step 4: Simplify right side
    1,114.96x = 1,250,000.54
  5. Step 5: Solve for x
    x = 1,250,000.54/1,114.96
  6. Step 6: Final answer
    x = 1,121.12

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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.