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Finding the Fourth Proportional to 346.27, 519.47 and 129.85

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Solution

The fourth proportional to 346.27, 519.47 and 129.85 is: 194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.27 : 519.47 = 129.85 : x
  2. Step 2: Convert to fraction form
    346.27/519.47 = 129.85/x
  3. Step 3: Cross multiply
    346.27x = 519.47 × 129.85
  4. Step 4: Simplify right side
    346.27x = 67,452.21
  5. Step 5: Solve for x
    x = 67,452.21/346.27
  6. Step 6: Final answer
    x = 194.80

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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.