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Finding the Fourth Proportional to 169.67, 253.14 and 155.09

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Solution

The fourth proportional to 169.67, 253.14 and 155.09 is: 231.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.67 : 253.14 = 155.09 : x
  2. Step 2: Convert to fraction form
    169.67/253.14 = 155.09/x
  3. Step 3: Cross multiply
    169.67x = 253.14 × 155.09
  4. Step 4: Simplify right side
    169.67x = 39,259.48
  5. Step 5: Solve for x
    x = 39,259.48/169.67
  6. Step 6: Final answer
    x = 231.39

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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.