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Finding the Fourth Proportional to 215.30, 323.06 and 186.45

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Solution

The fourth proportional to 215.30, 323.06 and 186.45 is: 279.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.30 : 323.06 = 186.45 : x
  2. Step 2: Convert to fraction form
    215.30/323.06 = 186.45/x
  3. Step 3: Cross multiply
    215.30x = 323.06 × 186.45
  4. Step 4: Simplify right side
    215.30x = 60,232.39
  5. Step 5: Solve for x
    x = 60,232.39/215.30
  6. Step 6: Final answer
    x = 279.76

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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.