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Finding the Fourth Proportional to 239.98, 360.24 and 142.70

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Solution

The fourth proportional to 239.98, 360.24 and 142.70 is: 214.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.98 : 360.24 = 142.70 : x
  2. Step 2: Convert to fraction form
    239.98/360.24 = 142.70/x
  3. Step 3: Cross multiply
    239.98x = 360.24 × 142.70
  4. Step 4: Simplify right side
    239.98x = 51,406.25
  5. Step 5: Solve for x
    x = 51,406.25/239.98
  6. Step 6: Final answer
    x = 214.21

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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.