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Finding the Fourth Proportional to 346.24, 519.20 and 129.76

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Solution

The fourth proportional to 346.24, 519.20 and 129.76 is: 194.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.24 : 519.20 = 129.76 : x
  2. Step 2: Convert to fraction form
    346.24/519.20 = 129.76/x
  3. Step 3: Cross multiply
    346.24x = 519.20 × 129.76
  4. Step 4: Simplify right side
    346.24x = 67,371.39
  5. Step 5: Solve for x
    x = 67,371.39/346.24
  6. Step 6: Final answer
    x = 194.58

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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.