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Finding the Fourth Proportional to 254.45, 351.17 and 156.23

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Solution

The fourth proportional to 254.45, 351.17 and 156.23 is: 215.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.45 : 351.17 = 156.23 : x
  2. Step 2: Convert to fraction form
    254.45/351.17 = 156.23/x
  3. Step 3: Cross multiply
    254.45x = 351.17 × 156.23
  4. Step 4: Simplify right side
    254.45x = 54,860.75
  5. Step 5: Solve for x
    x = 54,860.75/254.45
  6. Step 6: Final answer
    x = 215.60

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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.