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Finding the Fourth Proportional to 316.31, 474.26 and 213.44

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Solution

The fourth proportional to 316.31, 474.26 and 213.44 is: 320.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.31 : 474.26 = 213.44 : x
  2. Step 2: Convert to fraction form
    316.31/474.26 = 213.44/x
  3. Step 3: Cross multiply
    316.31x = 474.26 × 213.44
  4. Step 4: Simplify right side
    316.31x = 101,222.62
  5. Step 5: Solve for x
    x = 101,222.62/316.31
  6. Step 6: Final answer
    x = 320.02

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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.