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Finding the Fourth Proportional to 682.44, 1,023.12 and 681.60

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Solution

The fourth proportional to 682.44, 1,023.12 and 681.60 is: 1,021.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.44 : 1,023.12 = 681.60 : x
  2. Step 2: Convert to fraction form
    682.44/1,023.12 = 681.60/x
  3. Step 3: Cross multiply
    682.44x = 1,023.12 × 681.60
  4. Step 4: Simplify right side
    682.44x = 697,358.59
  5. Step 5: Solve for x
    x = 697,358.59/682.44
  6. Step 6: Final answer
    x = 1,021.86

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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.