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Finding the Fourth Proportional to 343.12, 511.42 and 331.87

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Solution

The fourth proportional to 343.12, 511.42 and 331.87 is: 494.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.12 : 511.42 = 331.87 : x
  2. Step 2: Convert to fraction form
    343.12/511.42 = 331.87/x
  3. Step 3: Cross multiply
    343.12x = 511.42 × 331.87
  4. Step 4: Simplify right side
    343.12x = 169,724.96
  5. Step 5: Solve for x
    x = 169,724.96/343.12
  6. Step 6: Final answer
    x = 494.65

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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.