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Finding the Fourth Proportional to 372.99, 559.08 and 318.72

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Solution

The fourth proportional to 372.99, 559.08 and 318.72 is: 477.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.99 : 559.08 = 318.72 : x
  2. Step 2: Convert to fraction form
    372.99/559.08 = 318.72/x
  3. Step 3: Cross multiply
    372.99x = 559.08 × 318.72
  4. Step 4: Simplify right side
    372.99x = 178,189.98
  5. Step 5: Solve for x
    x = 178,189.98/372.99
  6. Step 6: Final answer
    x = 477.73

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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.