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Finding the Fourth Proportional to 211.73, 317.60 and 67.46

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Solution

The fourth proportional to 211.73, 317.60 and 67.46 is: 101.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.73 : 317.60 = 67.46 : x
  2. Step 2: Convert to fraction form
    211.73/317.60 = 67.46/x
  3. Step 3: Cross multiply
    211.73x = 317.60 × 67.46
  4. Step 4: Simplify right side
    211.73x = 21,425.30
  5. Step 5: Solve for x
    x = 21,425.30/211.73
  6. Step 6: Final answer
    x = 101.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.