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Finding the Fourth Proportional to 682.26, 1,022.03 and 316.56

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Solution

The fourth proportional to 682.26, 1,022.03 and 316.56 is: 474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.26 : 1,022.03 = 316.56 : x
  2. Step 2: Convert to fraction form
    682.26/1,022.03 = 316.56/x
  3. Step 3: Cross multiply
    682.26x = 1,022.03 × 316.56
  4. Step 4: Simplify right side
    682.26x = 323,533.82
  5. Step 5: Solve for x
    x = 323,533.82/682.26
  6. Step 6: Final answer
    x = 474.21

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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.