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Finding the Fourth Proportional to 215.48, 323.27 and 71.19

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Solution

The fourth proportional to 215.48, 323.27 and 71.19 is: 106.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.48 : 323.27 = 71.19 : x
  2. Step 2: Convert to fraction form
    215.48/323.27 = 71.19/x
  3. Step 3: Cross multiply
    215.48x = 323.27 × 71.19
  4. Step 4: Simplify right side
    215.48x = 23,013.59
  5. Step 5: Solve for x
    x = 23,013.59/215.48
  6. Step 6: Final answer
    x = 106.80

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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.