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Finding the Fourth Proportional to 346.68, 520.22 and 255.15

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Solution

The fourth proportional to 346.68, 520.22 and 255.15 is: 382.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.68 : 520.22 = 255.15 : x
  2. Step 2: Convert to fraction form
    346.68/520.22 = 255.15/x
  3. Step 3: Cross multiply
    346.68x = 520.22 × 255.15
  4. Step 4: Simplify right side
    346.68x = 132,734.77
  5. Step 5: Solve for x
    x = 132,734.77/346.68
  6. Step 6: Final answer
    x = 382.87

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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.