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Finding the Fourth Proportional to 239.84, 359.04 and 143.84

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Solution

The fourth proportional to 239.84, 359.04 and 143.84 is: 215.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.84 : 359.04 = 143.84 : x
  2. Step 2: Convert to fraction form
    239.84/359.04 = 143.84/x
  3. Step 3: Cross multiply
    239.84x = 359.04 × 143.84
  4. Step 4: Simplify right side
    239.84x = 51,644.31
  5. Step 5: Solve for x
    x = 51,644.31/239.84
  6. Step 6: Final answer
    x = 215.33

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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.