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Finding the Fourth Proportional to 254.91, 382.29 and 90.38

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Solution

The fourth proportional to 254.91, 382.29 and 90.38 is: 135.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.91 : 382.29 = 90.38 : x
  2. Step 2: Convert to fraction form
    254.91/382.29 = 90.38/x
  3. Step 3: Cross multiply
    254.91x = 382.29 × 90.38
  4. Step 4: Simplify right side
    254.91x = 34,549.46
  5. Step 5: Solve for x
    x = 34,549.46/254.91
  6. Step 6: Final answer
    x = 135.54

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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.