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Finding the Fourth Proportional to 346.91, 520.39 and 115.79

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Solution

The fourth proportional to 346.91, 520.39 and 115.79 is: 173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.91 : 520.39 = 115.79 : x
  2. Step 2: Convert to fraction form
    346.91/520.39 = 115.79/x
  3. Step 3: Cross multiply
    346.91x = 520.39 × 115.79
  4. Step 4: Simplify right side
    346.91x = 60,254.08
  5. Step 5: Solve for x
    x = 60,254.08/346.91
  6. Step 6: Final answer
    x = 173.69

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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.