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Finding the Fourth Proportional to 346.31, 519.47 and 129.84

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Solution

The fourth proportional to 346.31, 519.47 and 129.84 is: 194.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.31 : 519.47 = 129.84 : x
  2. Step 2: Convert to fraction form
    346.31/519.47 = 129.84/x
  3. Step 3: Cross multiply
    346.31x = 519.47 × 129.84
  4. Step 4: Simplify right side
    346.31x = 67,447.98
  5. Step 5: Solve for x
    x = 67,447.98/346.31
  6. Step 6: Final answer
    x = 194.76

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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.