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Finding the Fourth Proportional to 370.80, 511.88 and 239.90

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Solution

The fourth proportional to 370.80, 511.88 and 239.90 is: 331.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.80 : 511.88 = 239.90 : x
  2. Step 2: Convert to fraction form
    370.80/511.88 = 239.90/x
  3. Step 3: Cross multiply
    370.80x = 511.88 × 239.90
  4. Step 4: Simplify right side
    370.80x = 122,796.25
  5. Step 5: Solve for x
    x = 122,796.25/370.80
  6. Step 6: Final answer
    x = 331.17

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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.