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Finding the Fourth Proportional to 240.36, 331.48 and 161.74

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Solution

The fourth proportional to 240.36, 331.48 and 161.74 is: 223.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.36 : 331.48 = 161.74 : x
  2. Step 2: Convert to fraction form
    240.36/331.48 = 161.74/x
  3. Step 3: Cross multiply
    240.36x = 331.48 × 161.74
  4. Step 4: Simplify right side
    240.36x = 53,612.77
  5. Step 5: Solve for x
    x = 53,612.77/240.36
  6. Step 6: Final answer
    x = 223.05

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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.