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Finding the Fourth Proportional to 732.86, 1,098.91 and 321.81

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Solution

The fourth proportional to 732.86, 1,098.91 and 321.81 is: 482.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.86 : 1,098.91 = 321.81 : x
  2. Step 2: Convert to fraction form
    732.86/1,098.91 = 321.81/x
  3. Step 3: Cross multiply
    732.86x = 1,098.91 × 321.81
  4. Step 4: Simplify right side
    732.86x = 353,640.23
  5. Step 5: Solve for x
    x = 353,640.23/732.86
  6. Step 6: Final answer
    x = 482.55

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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.