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Finding the Fourth Proportional to 347.92, 521.88 and 87.92

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Solution

The fourth proportional to 347.92, 521.88 and 87.92 is: 131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.92 : 521.88 = 87.92 : x
  2. Step 2: Convert to fraction form
    347.92/521.88 = 87.92/x
  3. Step 3: Cross multiply
    347.92x = 521.88 × 87.92
  4. Step 4: Simplify right side
    347.92x = 45,883.69
  5. Step 5: Solve for x
    x = 45,883.69/347.92
  6. Step 6: Final answer
    x = 131.88

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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.