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Finding the Fourth Proportional to 346.16, 519.44 and 129.88

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Solution

The fourth proportional to 346.16, 519.44 and 129.88 is: 194.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.16 : 519.44 = 129.88 : x
  2. Step 2: Convert to fraction form
    346.16/519.44 = 129.88/x
  3. Step 3: Cross multiply
    346.16x = 519.44 × 129.88
  4. Step 4: Simplify right side
    346.16x = 67,464.87
  5. Step 5: Solve for x
    x = 67,464.87/346.16
  6. Step 6: Final answer
    x = 194.90

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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.