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Finding the Fourth Proportional to 937.20, 1,405.49 and 449.94

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Solution

The fourth proportional to 937.20, 1,405.49 and 449.94 is: 674.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.20 : 1,405.49 = 449.94 : x
  2. Step 2: Convert to fraction form
    937.20/1,405.49 = 449.94/x
  3. Step 3: Cross multiply
    937.20x = 1,405.49 × 449.94
  4. Step 4: Simplify right side
    937.20x = 632,383.92
  5. Step 5: Solve for x
    x = 632,383.92/937.20
  6. Step 6: Final answer
    x = 674.76

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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.