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Finding the Fourth Proportional to 372.71, 513.80 and 261.84

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Solution

The fourth proportional to 372.71, 513.80 and 261.84 is: 360.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.71 : 513.80 = 261.84 : x
  2. Step 2: Convert to fraction form
    372.71/513.80 = 261.84/x
  3. Step 3: Cross multiply
    372.71x = 513.80 × 261.84
  4. Step 4: Simplify right side
    372.71x = 134,532.08
  5. Step 5: Solve for x
    x = 134,532.08/372.71
  6. Step 6: Final answer
    x = 360.96

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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.