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Finding the Fourth Proportional to 169.99, 253.20 and 168.77

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Solution

The fourth proportional to 169.99, 253.20 and 168.77 is: 251.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.99 : 253.20 = 168.77 : x
  2. Step 2: Convert to fraction form
    169.99/253.20 = 168.77/x
  3. Step 3: Cross multiply
    169.99x = 253.20 × 168.77
  4. Step 4: Simplify right side
    169.99x = 42,732.56
  5. Step 5: Solve for x
    x = 42,732.56/169.99
  6. Step 6: Final answer
    x = 251.38

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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.