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Finding the Fourth Proportional to 342.08, 512.36 and 268.85

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Solution

The fourth proportional to 342.08, 512.36 and 268.85 is: 402.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.08 : 512.36 = 268.85 : x
  2. Step 2: Convert to fraction form
    342.08/512.36 = 268.85/x
  3. Step 3: Cross multiply
    342.08x = 512.36 × 268.85
  4. Step 4: Simplify right side
    342.08x = 137,749.94
  5. Step 5: Solve for x
    x = 137,749.94/342.08
  6. Step 6: Final answer
    x = 402.69

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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.