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Finding the Fourth Proportional to 682.97, 1,023.66 and 423.16

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Solution

The fourth proportional to 682.97, 1,023.66 and 423.16 is: 634.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.97 : 1,023.66 = 423.16 : x
  2. Step 2: Convert to fraction form
    682.97/1,023.66 = 423.16/x
  3. Step 3: Cross multiply
    682.97x = 1,023.66 × 423.16
  4. Step 4: Simplify right side
    682.97x = 433,169.41
  5. Step 5: Solve for x
    x = 433,169.41/682.97
  6. Step 6: Final answer
    x = 634.25

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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.