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Finding the Fourth Proportional to 143.01, 215.69 and 141.48

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Solution

The fourth proportional to 143.01, 215.69 and 141.48 is: 213.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.01 : 215.69 = 141.48 : x
  2. Step 2: Convert to fraction form
    143.01/215.69 = 141.48/x
  3. Step 3: Cross multiply
    143.01x = 215.69 × 141.48
  4. Step 4: Simplify right side
    143.01x = 30,515.11
  5. Step 5: Solve for x
    x = 30,515.11/143.01
  6. Step 6: Final answer
    x = 213.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.