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Finding the Fourth Proportional to 211.71, 316.01 and 196.70

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Solution

The fourth proportional to 211.71, 316.01 and 196.70 is: 293.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.71 : 316.01 = 196.70 : x
  2. Step 2: Convert to fraction form
    211.71/316.01 = 196.70/x
  3. Step 3: Cross multiply
    211.71x = 316.01 × 196.70
  4. Step 4: Simplify right side
    211.71x = 62,156.60
  5. Step 5: Solve for x
    x = 62,156.60/211.71
  6. Step 6: Final answer
    x = 293.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.