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Finding the Fourth Proportional to 211.93, 291.27 and 187.22

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Solution

The fourth proportional to 211.93, 291.27 and 187.22 is: 257.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.93 : 291.27 = 187.22 : x
  2. Step 2: Convert to fraction form
    211.93/291.27 = 187.22/x
  3. Step 3: Cross multiply
    211.93x = 291.27 × 187.22
  4. Step 4: Simplify right side
    211.93x = 54,531.57
  5. Step 5: Solve for x
    x = 54,531.57/211.93
  6. Step 6: Final answer
    x = 257.31

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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.