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Finding the Fourth Proportional to 240.81, 332.21 and 153.43

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Solution

The fourth proportional to 240.81, 332.21 and 153.43 is: 211.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.81 : 332.21 = 153.43 : x
  2. Step 2: Convert to fraction form
    240.81/332.21 = 153.43/x
  3. Step 3: Cross multiply
    240.81x = 332.21 × 153.43
  4. Step 4: Simplify right side
    240.81x = 50,969.96
  5. Step 5: Solve for x
    x = 50,969.96/240.81
  6. Step 6: Final answer
    x = 211.66

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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.