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Finding the Fourth Proportional to 215.53, 323.06 and 93.69

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Solution

The fourth proportional to 215.53, 323.06 and 93.69 is: 140.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.53 : 323.06 = 93.69 : x
  2. Step 2: Convert to fraction form
    215.53/323.06 = 93.69/x
  3. Step 3: Cross multiply
    215.53x = 323.06 × 93.69
  4. Step 4: Simplify right side
    215.53x = 30,267.02
  5. Step 5: Solve for x
    x = 30,267.02/215.53
  6. Step 6: Final answer
    x = 140.43

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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.