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Finding the Fourth Proportional to 732.72, 1,098.90 and 321.69

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Solution

The fourth proportional to 732.72, 1,098.90 and 321.69 is: 482.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.72 : 1,098.90 = 321.69 : x
  2. Step 2: Convert to fraction form
    732.72/1,098.90 = 321.69/x
  3. Step 3: Cross multiply
    732.72x = 1,098.90 × 321.69
  4. Step 4: Simplify right side
    732.72x = 353,505.14
  5. Step 5: Solve for x
    x = 353,505.14/732.72
  6. Step 6: Final answer
    x = 482.46

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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.