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Finding the Fourth Proportional to 254.20, 350.76 and 155.96

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Solution

The fourth proportional to 254.20, 350.76 and 155.96 is: 215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.20 : 350.76 = 155.96 : x
  2. Step 2: Convert to fraction form
    254.20/350.76 = 155.96/x
  3. Step 3: Cross multiply
    254.20x = 350.76 × 155.96
  4. Step 4: Simplify right side
    254.20x = 54,704.53
  5. Step 5: Solve for x
    x = 54,704.53/254.20
  6. Step 6: Final answer
    x = 215.20

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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.