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Finding the Fourth Proportional to 372.79, 513.96 and 239.77

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Solution

The fourth proportional to 372.79, 513.96 and 239.77 is: 330.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.79 : 513.96 = 239.77 : x
  2. Step 2: Convert to fraction form
    372.79/513.96 = 239.77/x
  3. Step 3: Cross multiply
    372.79x = 513.96 × 239.77
  4. Step 4: Simplify right side
    372.79x = 123,232.56
  5. Step 5: Solve for x
    x = 123,232.56/372.79
  6. Step 6: Final answer
    x = 330.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.