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Finding the Fourth Proportional to 254.48, 351.19 and 156.20

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Solution

The fourth proportional to 254.48, 351.19 and 156.20 is: 215.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.48 : 351.19 = 156.20 : x
  2. Step 2: Convert to fraction form
    254.48/351.19 = 156.20/x
  3. Step 3: Cross multiply
    254.48x = 351.19 × 156.20
  4. Step 4: Simplify right side
    254.48x = 54,856.95
  5. Step 5: Solve for x
    x = 54,856.95/254.48
  6. Step 6: Final answer
    x = 215.56

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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.