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Finding the Fourth Proportional to 239.03, 329.83 and 145.78

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Solution

The fourth proportional to 239.03, 329.83 and 145.78 is: 201.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.03 : 329.83 = 145.78 : x
  2. Step 2: Convert to fraction form
    239.03/329.83 = 145.78/x
  3. Step 3: Cross multiply
    239.03x = 329.83 × 145.78
  4. Step 4: Simplify right side
    239.03x = 48,080.24
  5. Step 5: Solve for x
    x = 48,080.24/239.03
  6. Step 6: Final answer
    x = 201.15

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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.