Home / 239.20-330.10-135.70

Finding the Fourth Proportional to 239.20, 330.10 and 135.70

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Solution

The fourth proportional to 239.20, 330.10 and 135.70 is: 187.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.20 : 330.10 = 135.70 : x
  2. Step 2: Convert to fraction form
    239.20/330.10 = 135.70/x
  3. Step 3: Cross multiply
    239.20x = 330.10 × 135.70
  4. Step 4: Simplify right side
    239.20x = 44,795.64
  5. Step 5: Solve for x
    x = 44,795.64/239.20
  6. Step 6: Final answer
    x = 187.27

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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.