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Finding the Fourth Proportional to 211.08, 291.33 and 137.26

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Solution

The fourth proportional to 211.08, 291.33 and 137.26 is: 189.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.08 : 291.33 = 137.26 : x
  2. Step 2: Convert to fraction form
    211.08/291.33 = 137.26/x
  3. Step 3: Cross multiply
    211.08x = 291.33 × 137.26
  4. Step 4: Simplify right side
    211.08x = 39,989.39
  5. Step 5: Solve for x
    x = 39,989.39/211.08
  6. Step 6: Final answer
    x = 189.46

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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.