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Finding the Fourth Proportional to 215.51, 323.09 and 124.27

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Solution

The fourth proportional to 215.51, 323.09 and 124.27 is: 186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.51 : 323.09 = 124.27 : x
  2. Step 2: Convert to fraction form
    215.51/323.09 = 124.27/x
  3. Step 3: Cross multiply
    215.51x = 323.09 × 124.27
  4. Step 4: Simplify right side
    215.51x = 40,150.39
  5. Step 5: Solve for x
    x = 40,150.39/215.51
  6. Step 6: Final answer
    x = 186.30

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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.