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Finding the Fourth Proportional to 165.92, 247.78 and 141.60

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Solution

The fourth proportional to 165.92, 247.78 and 141.60 is: 211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.92 : 247.78 = 141.60 : x
  2. Step 2: Convert to fraction form
    165.92/247.78 = 141.60/x
  3. Step 3: Cross multiply
    165.92x = 247.78 × 141.60
  4. Step 4: Simplify right side
    165.92x = 35,085.65
  5. Step 5: Solve for x
    x = 35,085.65/165.92
  6. Step 6: Final answer
    x = 211.46

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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.