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Finding the Fourth Proportional to 144.36, 215.49 and 141.48

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Solution

The fourth proportional to 144.36, 215.49 and 141.48 is: 211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.36 : 215.49 = 141.48 : x
  2. Step 2: Convert to fraction form
    144.36/215.49 = 141.48/x
  3. Step 3: Cross multiply
    144.36x = 215.49 × 141.48
  4. Step 4: Simplify right side
    144.36x = 30,487.53
  5. Step 5: Solve for x
    x = 30,487.53/144.36
  6. Step 6: Final answer
    x = 211.19

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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.