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Finding the Fourth Proportional to 215.26, 297.17 and 156.33

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Solution

The fourth proportional to 215.26, 297.17 and 156.33 is: 215.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.26 : 297.17 = 156.33 : x
  2. Step 2: Convert to fraction form
    215.26/297.17 = 156.33/x
  3. Step 3: Cross multiply
    215.26x = 297.17 × 156.33
  4. Step 4: Simplify right side
    215.26x = 46,456.39
  5. Step 5: Solve for x
    x = 46,456.39/215.26
  6. Step 6: Final answer
    x = 215.82

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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.