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Finding the Fourth Proportional to 215.62, 295.61 and 211.73

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Solution

The fourth proportional to 215.62, 295.61 and 211.73 is: 290.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.62 : 295.61 = 211.73 : x
  2. Step 2: Convert to fraction form
    215.62/295.61 = 211.73/x
  3. Step 3: Cross multiply
    215.62x = 295.61 × 211.73
  4. Step 4: Simplify right side
    215.62x = 62,589.51
  5. Step 5: Solve for x
    x = 62,589.51/215.62
  6. Step 6: Final answer
    x = 290.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.