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Finding the Fourth Proportional to 254.96, 382.34 and 100.80

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Solution

The fourth proportional to 254.96, 382.34 and 100.80 is: 151.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.96 : 382.34 = 100.80 : x
  2. Step 2: Convert to fraction form
    254.96/382.34 = 100.80/x
  3. Step 3: Cross multiply
    254.96x = 382.34 × 100.80
  4. Step 4: Simplify right side
    254.96x = 38,539.87
  5. Step 5: Solve for x
    x = 38,539.87/254.96
  6. Step 6: Final answer
    x = 151.16

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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.