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Finding the Fourth Proportional to 346.85, 520.29 and 115.65

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Solution

The fourth proportional to 346.85, 520.29 and 115.65 is: 173.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.85 : 520.29 = 115.65 : x
  2. Step 2: Convert to fraction form
    346.85/520.29 = 115.65/x
  3. Step 3: Cross multiply
    346.85x = 520.29 × 115.65
  4. Step 4: Simplify right side
    346.85x = 60,171.54
  5. Step 5: Solve for x
    x = 60,171.54/346.85
  6. Step 6: Final answer
    x = 173.48

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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.