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Finding the Fourth Proportional to 243.60, 336.22 and 160.71

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Solution

The fourth proportional to 243.60, 336.22 and 160.71 is: 221.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.60 : 336.22 = 160.71 : x
  2. Step 2: Convert to fraction form
    243.60/336.22 = 160.71/x
  3. Step 3: Cross multiply
    243.60x = 336.22 × 160.71
  4. Step 4: Simplify right side
    243.60x = 54,033.51
  5. Step 5: Solve for x
    x = 54,033.51/243.60
  6. Step 6: Final answer
    x = 221.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.