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Finding the Fourth Proportional to 342.91, 512.26 and 330.76

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Solution

The fourth proportional to 342.91, 512.26 and 330.76 is: 494.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.91 : 512.26 = 330.76 : x
  2. Step 2: Convert to fraction form
    342.91/512.26 = 330.76/x
  3. Step 3: Cross multiply
    342.91x = 512.26 × 330.76
  4. Step 4: Simplify right side
    342.91x = 169,435.12
  5. Step 5: Solve for x
    x = 169,435.12/342.91
  6. Step 6: Final answer
    x = 494.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.