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Finding the Fourth Proportional to 211.30, 293.42 and 209.27

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Solution

The fourth proportional to 211.30, 293.42 and 209.27 is: 290.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.30 : 293.42 = 209.27 : x
  2. Step 2: Convert to fraction form
    211.30/293.42 = 209.27/x
  3. Step 3: Cross multiply
    211.30x = 293.42 × 209.27
  4. Step 4: Simplify right side
    211.30x = 61,405.26
  5. Step 5: Solve for x
    x = 61,405.26/211.30
  6. Step 6: Final answer
    x = 290.61

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.