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Finding the Fourth Proportional to 215.97, 298.04 and 122.70

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Solution

The fourth proportional to 215.97, 298.04 and 122.70 is: 169.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.97 : 298.04 = 122.70 : x
  2. Step 2: Convert to fraction form
    215.97/298.04 = 122.70/x
  3. Step 3: Cross multiply
    215.97x = 298.04 × 122.70
  4. Step 4: Simplify right side
    215.97x = 36,567.40
  5. Step 5: Solve for x
    x = 36,567.40/215.97
  6. Step 6: Final answer
    x = 169.32

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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.