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Finding the Fourth Proportional to 239.77, 330.85 and 134.85

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Solution

The fourth proportional to 239.77, 330.85 and 134.85 is: 186.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.77 : 330.85 = 134.85 : x
  2. Step 2: Convert to fraction form
    239.77/330.85 = 134.85/x
  3. Step 3: Cross multiply
    239.77x = 330.85 × 134.85
  4. Step 4: Simplify right side
    239.77x = 44,614.45
  5. Step 5: Solve for x
    x = 44,614.45/239.77
  6. Step 6: Final answer
    x = 186.07

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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.