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Finding the Fourth Proportional to 239.80, 331.14 and 152.50

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Solution

The fourth proportional to 239.80, 331.14 and 152.50 is: 210.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.80 : 331.14 = 152.50 : x
  2. Step 2: Convert to fraction form
    239.80/331.14 = 152.50/x
  3. Step 3: Cross multiply
    239.80x = 331.14 × 152.50
  4. Step 4: Simplify right side
    239.80x = 50,498.85
  5. Step 5: Solve for x
    x = 50,498.85/239.80
  6. Step 6: Final answer
    x = 210.59

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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.