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Finding the Fourth Proportional to 372.13, 557.69 and 280.06

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Solution

The fourth proportional to 372.13, 557.69 and 280.06 is: 419.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.13 : 557.69 = 280.06 : x
  2. Step 2: Convert to fraction form
    372.13/557.69 = 280.06/x
  3. Step 3: Cross multiply
    372.13x = 557.69 × 280.06
  4. Step 4: Simplify right side
    372.13x = 156,183.87
  5. Step 5: Solve for x
    x = 156,183.87/372.13
  6. Step 6: Final answer
    x = 419.71

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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.