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Finding the Fourth Proportional to 372.37, 513.64 and 239.76

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Solution

The fourth proportional to 372.37, 513.64 and 239.76 is: 330.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.37 : 513.64 = 239.76 : x
  2. Step 2: Convert to fraction form
    372.37/513.64 = 239.76/x
  3. Step 3: Cross multiply
    372.37x = 513.64 × 239.76
  4. Step 4: Simplify right side
    372.37x = 123,152.12
  5. Step 5: Solve for x
    x = 123,152.12/372.37
  6. Step 6: Final answer
    x = 330.72

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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.