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Finding the Fourth Proportional to 1,098.82, 1,645.17 and 751.42

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Solution

The fourth proportional to 1,098.82, 1,645.17 and 751.42 is: 1,125.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.82 : 1,645.17 = 751.42 : x
  2. Step 2: Convert to fraction form
    1,098.82/1,645.17 = 751.42/x
  3. Step 3: Cross multiply
    1,098.82x = 1,645.17 × 751.42
  4. Step 4: Simplify right side
    1,098.82x = 1,236,213.64
  5. Step 5: Solve for x
    x = 1,236,213.64/1,098.82
  6. Step 6: Final answer
    x = 1,125.04

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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.