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Finding the Fourth Proportional to 211.01, 316.04 and 129.74

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Solution

The fourth proportional to 211.01, 316.04 and 129.74 is: 194.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.01 : 316.04 = 129.74 : x
  2. Step 2: Convert to fraction form
    211.01/316.04 = 129.74/x
  3. Step 3: Cross multiply
    211.01x = 316.04 × 129.74
  4. Step 4: Simplify right side
    211.01x = 41,000.80
  5. Step 5: Solve for x
    x = 41,000.80/211.01
  6. Step 6: Final answer
    x = 194.31

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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.