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Finding the Fourth Proportional to 169.60, 253.19 and 156.61

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Solution

The fourth proportional to 169.60, 253.19 and 156.61 is: 233.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.60 : 253.19 = 156.61 : x
  2. Step 2: Convert to fraction form
    169.60/253.19 = 156.61/x
  3. Step 3: Cross multiply
    169.60x = 253.19 × 156.61
  4. Step 4: Simplify right side
    169.60x = 39,652.09
  5. Step 5: Solve for x
    x = 39,652.09/169.60
  6. Step 6: Final answer
    x = 233.80

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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.