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Finding the Fourth Proportional to 144.65, 200.90 and 143.39

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Solution

The fourth proportional to 144.65, 200.90 and 143.39 is: 199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.65 : 200.90 = 143.39 : x
  2. Step 2: Convert to fraction form
    144.65/200.90 = 143.39/x
  3. Step 3: Cross multiply
    144.65x = 200.90 × 143.39
  4. Step 4: Simplify right side
    144.65x = 28,805.33
  5. Step 5: Solve for x
    x = 28,805.33/144.65
  6. Step 6: Final answer
    x = 199.15

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.