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Finding the Fourth Proportional to 240, 331.35 and 157.34

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Solution

The fourth proportional to 240, 331.35 and 157.34 is: 217.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    240 : 331.35 = 157.34 : x
  2. Step 2: Convert to fraction form
    240/331.35 = 157.34/x
  3. Step 3: Cross multiply
    240x = 331.35 × 157.34
  4. Step 4: Simplify right side
    240x = 52,132.95
  5. Step 5: Solve for x
    x = 52,132.95/240
  6. Step 6: Final answer
    x = 217.22

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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.