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Finding the Fourth Proportional to 169.34, 254.45 and 158.40

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Solution

The fourth proportional to 169.34, 254.45 and 158.40 is: 238.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.34 : 254.45 = 158.40 : x
  2. Step 2: Convert to fraction form
    169.34/254.45 = 158.40/x
  3. Step 3: Cross multiply
    169.34x = 254.45 × 158.40
  4. Step 4: Simplify right side
    169.34x = 40,305.28
  5. Step 5: Solve for x
    x = 40,305.28/169.34
  6. Step 6: Final answer
    x = 238.02

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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.