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Finding the Fourth Proportional to 347.57, 521.35 and 131.09

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Solution

The fourth proportional to 347.57, 521.35 and 131.09 is: 196.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.57 : 521.35 = 131.09 : x
  2. Step 2: Convert to fraction form
    347.57/521.35 = 131.09/x
  3. Step 3: Cross multiply
    347.57x = 521.35 × 131.09
  4. Step 4: Simplify right side
    347.57x = 68,344.75
  5. Step 5: Solve for x
    x = 68,344.75/347.57
  6. Step 6: Final answer
    x = 196.64

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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.