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Finding the Fourth Proportional to 144.25, 215.27 and 140.60

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Solution

The fourth proportional to 144.25, 215.27 and 140.60 is: 209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.25 : 215.27 = 140.60 : x
  2. Step 2: Convert to fraction form
    144.25/215.27 = 140.60/x
  3. Step 3: Cross multiply
    144.25x = 215.27 × 140.60
  4. Step 4: Simplify right side
    144.25x = 30,266.96
  5. Step 5: Solve for x
    x = 30,266.96/144.25
  6. Step 6: Final answer
    x = 209.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.