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Finding the Fourth Proportional to 170.19, 254.18 and 156.56

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Solution

The fourth proportional to 170.19, 254.18 and 156.56 is: 233.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.19 : 254.18 = 156.56 : x
  2. Step 2: Convert to fraction form
    170.19/254.18 = 156.56/x
  3. Step 3: Cross multiply
    170.19x = 254.18 × 156.56
  4. Step 4: Simplify right side
    170.19x = 39,793.54
  5. Step 5: Solve for x
    x = 39,793.54/170.19
  6. Step 6: Final answer
    x = 233.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.