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Finding the Fourth Proportional to 207.68, 286.40 and 166.23

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Solution

The fourth proportional to 207.68, 286.40 and 166.23 is: 229.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.68 : 286.40 = 166.23 : x
  2. Step 2: Convert to fraction form
    207.68/286.40 = 166.23/x
  3. Step 3: Cross multiply
    207.68x = 286.40 × 166.23
  4. Step 4: Simplify right side
    207.68x = 47,608.69
  5. Step 5: Solve for x
    x = 47,608.69/207.68
  6. Step 6: Final answer
    x = 229.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.