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Finding the Fourth Proportional to 347.98, 522.17 and 131.55

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Solution

The fourth proportional to 347.98, 522.17 and 131.55 is: 197.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.98 : 522.17 = 131.55 : x
  2. Step 2: Convert to fraction form
    347.98/522.17 = 131.55/x
  3. Step 3: Cross multiply
    347.98x = 522.17 × 131.55
  4. Step 4: Simplify right side
    347.98x = 68,691.46
  5. Step 5: Solve for x
    x = 68,691.46/347.98
  6. Step 6: Final answer
    x = 197.40

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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.