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Finding the Fourth Proportional to 170.15, 253.76 and 168.53

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Solution

The fourth proportional to 170.15, 253.76 and 168.53 is: 251.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.15 : 253.76 = 168.53 : x
  2. Step 2: Convert to fraction form
    170.15/253.76 = 168.53/x
  3. Step 3: Cross multiply
    170.15x = 253.76 × 168.53
  4. Step 4: Simplify right side
    170.15x = 42,764.06
  5. Step 5: Solve for x
    x = 42,764.06/170.15
  6. Step 6: Final answer
    x = 251.34

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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.