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Finding the Fourth Proportional to 187.22, 279.30 and 169.81

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Solution

The fourth proportional to 187.22, 279.30 and 169.81 is: 253.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.22 : 279.30 = 169.81 : x
  2. Step 2: Convert to fraction form
    187.22/279.30 = 169.81/x
  3. Step 3: Cross multiply
    187.22x = 279.30 × 169.81
  4. Step 4: Simplify right side
    187.22x = 47,425.69
  5. Step 5: Solve for x
    x = 47,425.69/187.22
  6. Step 6: Final answer
    x = 253.32

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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.