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Finding the Fourth Proportional to 331.24, 455.94 and 282.52

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Solution

The fourth proportional to 331.24, 455.94 and 282.52 is: 388.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.24 : 455.94 = 282.52 : x
  2. Step 2: Convert to fraction form
    331.24/455.94 = 282.52/x
  3. Step 3: Cross multiply
    331.24x = 455.94 × 282.52
  4. Step 4: Simplify right side
    331.24x = 128,812.17
  5. Step 5: Solve for x
    x = 128,812.17/331.24
  6. Step 6: Final answer
    x = 388.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.