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Finding the Fourth Proportional to 349.16, 523.77 and 129.72

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Solution

The fourth proportional to 349.16, 523.77 and 129.72 is: 194.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.16 : 523.77 = 129.72 : x
  2. Step 2: Convert to fraction form
    349.16/523.77 = 129.72/x
  3. Step 3: Cross multiply
    349.16x = 523.77 × 129.72
  4. Step 4: Simplify right side
    349.16x = 67,943.44
  5. Step 5: Solve for x
    x = 67,943.44/349.16
  6. Step 6: Final answer
    x = 194.59

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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.