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Finding the Fourth Proportional to 239.03, 329.72 and 151.55

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Solution

The fourth proportional to 239.03, 329.72 and 151.55 is: 209.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.03 : 329.72 = 151.55 : x
  2. Step 2: Convert to fraction form
    239.03/329.72 = 151.55/x
  3. Step 3: Cross multiply
    239.03x = 329.72 × 151.55
  4. Step 4: Simplify right side
    239.03x = 49,969.07
  5. Step 5: Solve for x
    x = 49,969.07/239.03
  6. Step 6: Final answer
    x = 209.05

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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.