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Finding the Fourth Proportional to 937.92, 1,405.80 and 449.85

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Solution

The fourth proportional to 937.92, 1,405.80 and 449.85 is: 674.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.92 : 1,405.80 = 449.85 : x
  2. Step 2: Convert to fraction form
    937.92/1,405.80 = 449.85/x
  3. Step 3: Cross multiply
    937.92x = 1,405.80 × 449.85
  4. Step 4: Simplify right side
    937.92x = 632,399.13
  5. Step 5: Solve for x
    x = 632,399.13/937.92
  6. Step 6: Final answer
    x = 674.26

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.