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Finding the Fourth Proportional to 371.03, 511.74 and 239.90

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Solution

The fourth proportional to 371.03, 511.74 and 239.90 is: 330.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.03 : 511.74 = 239.90 : x
  2. Step 2: Convert to fraction form
    371.03/511.74 = 239.90/x
  3. Step 3: Cross multiply
    371.03x = 511.74 × 239.90
  4. Step 4: Simplify right side
    371.03x = 122,763.87
  5. Step 5: Solve for x
    x = 122,763.87/371.03
  6. Step 6: Final answer
    x = 330.88

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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.