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Finding the Fourth Proportional to 240.81, 359.48 and 211.62

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Solution

The fourth proportional to 240.81, 359.48 and 211.62 is: 315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.81 : 359.48 = 211.62 : x
  2. Step 2: Convert to fraction form
    240.81/359.48 = 211.62/x
  3. Step 3: Cross multiply
    240.81x = 359.48 × 211.62
  4. Step 4: Simplify right side
    240.81x = 76,073.77
  5. Step 5: Solve for x
    x = 76,073.77/240.81
  6. Step 6: Final answer
    x = 315.90

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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.