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Finding the Fourth Proportional to 342.45, 511.91 and 254.97

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Solution

The fourth proportional to 342.45, 511.91 and 254.97 is: 381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.45 : 511.91 = 254.97 : x
  2. Step 2: Convert to fraction form
    342.45/511.91 = 254.97/x
  3. Step 3: Cross multiply
    342.45x = 511.91 × 254.97
  4. Step 4: Simplify right side
    342.45x = 130,520.42
  5. Step 5: Solve for x
    x = 130,520.42/342.45
  6. Step 6: Final answer
    x = 381.14

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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.