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Finding the Fourth Proportional to 215.13, 322.17 and 169.37

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Solution

The fourth proportional to 215.13, 322.17 and 169.37 is: 253.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.13 : 322.17 = 169.37 : x
  2. Step 2: Convert to fraction form
    215.13/322.17 = 169.37/x
  3. Step 3: Cross multiply
    215.13x = 322.17 × 169.37
  4. Step 4: Simplify right side
    215.13x = 54,565.93
  5. Step 5: Solve for x
    x = 54,565.93/215.13
  6. Step 6: Final answer
    x = 253.64

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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.