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Finding the Fourth Proportional to 239.85, 360.08 and 159.21

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Solution

The fourth proportional to 239.85, 360.08 and 159.21 is: 239.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.85 : 360.08 = 159.21 : x
  2. Step 2: Convert to fraction form
    239.85/360.08 = 159.21/x
  3. Step 3: Cross multiply
    239.85x = 360.08 × 159.21
  4. Step 4: Simplify right side
    239.85x = 57,327.54
  5. Step 5: Solve for x
    x = 57,327.54/239.85
  6. Step 6: Final answer
    x = 239.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.