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Finding the Fourth Proportional to 737.12, 1,105.68 and 326.72

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Solution

The fourth proportional to 737.12, 1,105.68 and 326.72 is: 490.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.12 : 1,105.68 = 326.72 : x
  2. Step 2: Convert to fraction form
    737.12/1,105.68 = 326.72/x
  3. Step 3: Cross multiply
    737.12x = 1,105.68 × 326.72
  4. Step 4: Simplify right side
    737.12x = 361,247.77
  5. Step 5: Solve for x
    x = 361,247.77/737.12
  6. Step 6: Final answer
    x = 490.08

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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.