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Finding the Fourth Proportional to 187.32, 279.63 and 165.72

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Solution

The fourth proportional to 187.32, 279.63 and 165.72 is: 247.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.32 : 279.63 = 165.72 : x
  2. Step 2: Convert to fraction form
    187.32/279.63 = 165.72/x
  3. Step 3: Cross multiply
    187.32x = 279.63 × 165.72
  4. Step 4: Simplify right side
    187.32x = 46,340.28
  5. Step 5: Solve for x
    x = 46,340.28/187.32
  6. Step 6: Final answer
    x = 247.39

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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.