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Finding the Fourth Proportional to 681.33, 1,022.43 and 316.14

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Solution

The fourth proportional to 681.33, 1,022.43 and 316.14 is: 474.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.33 : 1,022.43 = 316.14 : x
  2. Step 2: Convert to fraction form
    681.33/1,022.43 = 316.14/x
  3. Step 3: Cross multiply
    681.33x = 1,022.43 × 316.14
  4. Step 4: Simplify right side
    681.33x = 323,231.02
  5. Step 5: Solve for x
    x = 323,231.02/681.33
  6. Step 6: Final answer
    x = 474.41

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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.