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Finding the Fourth Proportional to 243.82, 365.85 and 139.93

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Solution

The fourth proportional to 243.82, 365.85 and 139.93 is: 209.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.82 : 365.85 = 139.93 : x
  2. Step 2: Convert to fraction form
    243.82/365.85 = 139.93/x
  3. Step 3: Cross multiply
    243.82x = 365.85 × 139.93
  4. Step 4: Simplify right side
    243.82x = 51,194.53
  5. Step 5: Solve for x
    x = 51,194.53/243.82
  6. Step 6: Final answer
    x = 209.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.