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Finding the Fourth Proportional to 254.27, 380.53 and 156.74

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Solution

The fourth proportional to 254.27, 380.53 and 156.74 is: 234.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.27 : 380.53 = 156.74 : x
  2. Step 2: Convert to fraction form
    254.27/380.53 = 156.74/x
  3. Step 3: Cross multiply
    254.27x = 380.53 × 156.74
  4. Step 4: Simplify right side
    254.27x = 59,642.57
  5. Step 5: Solve for x
    x = 59,642.57/254.27
  6. Step 6: Final answer
    x = 234.56

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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.