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Finding the Fourth Proportional to 169.99, 255.22 and 156.40

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Solution

The fourth proportional to 169.99, 255.22 and 156.40 is: 234.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.99 : 255.22 = 156.40 : x
  2. Step 2: Convert to fraction form
    169.99/255.22 = 156.40/x
  3. Step 3: Cross multiply
    169.99x = 255.22 × 156.40
  4. Step 4: Simplify right side
    169.99x = 39,915.38
  5. Step 5: Solve for x
    x = 39,915.38/169.99
  6. Step 6: Final answer
    x = 234.81

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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.