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Finding the Fourth Proportional to 732.99, 1,098.71 and 321.78

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Solution

The fourth proportional to 732.99, 1,098.71 and 321.78 is: 482.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.99 : 1,098.71 = 321.78 : x
  2. Step 2: Convert to fraction form
    732.99/1,098.71 = 321.78/x
  3. Step 3: Cross multiply
    732.99x = 1,098.71 × 321.78
  4. Step 4: Simplify right side
    732.99x = 353,538.21
  5. Step 5: Solve for x
    x = 353,538.21/732.99
  6. Step 6: Final answer
    x = 482.33

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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.