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Finding the Fourth Proportional to 215.38, 297.30 and 168.70

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Solution

The fourth proportional to 215.38, 297.30 and 168.70 is: 232.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.38 : 297.30 = 168.70 : x
  2. Step 2: Convert to fraction form
    215.38/297.30 = 168.70/x
  3. Step 3: Cross multiply
    215.38x = 297.30 × 168.70
  4. Step 4: Simplify right side
    215.38x = 50,154.51
  5. Step 5: Solve for x
    x = 50,154.51/215.38
  6. Step 6: Final answer
    x = 232.87

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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.