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Finding the Fourth Proportional to 372.60, 513.91 and 248.43

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Solution

The fourth proportional to 372.60, 513.91 and 248.43 is: 342.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.60 : 513.91 = 248.43 : x
  2. Step 2: Convert to fraction form
    372.60/513.91 = 248.43/x
  3. Step 3: Cross multiply
    372.60x = 513.91 × 248.43
  4. Step 4: Simplify right side
    372.60x = 127,667.86
  5. Step 5: Solve for x
    x = 127,667.86/372.60
  6. Step 6: Final answer
    x = 342.64

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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.