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Finding the Fourth Proportional to 682.57, 1,023.66 and 266.03

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Solution

The fourth proportional to 682.57, 1,023.66 and 266.03 is: 398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.57 : 1,023.66 = 266.03 : x
  2. Step 2: Convert to fraction form
    682.57/1,023.66 = 266.03/x
  3. Step 3: Cross multiply
    682.57x = 1,023.66 × 266.03
  4. Step 4: Simplify right side
    682.57x = 272,324.27
  5. Step 5: Solve for x
    x = 272,324.27/682.57
  6. Step 6: Final answer
    x = 398.97

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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.