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Finding the Fourth Proportional to 682.66, 1,023.56 and 451.66

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Solution

The fourth proportional to 682.66, 1,023.56 and 451.66 is: 677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.66 : 1,023.56 = 451.66 : x
  2. Step 2: Convert to fraction form
    682.66/1,023.56 = 451.66/x
  3. Step 3: Cross multiply
    682.66x = 1,023.56 × 451.66
  4. Step 4: Simplify right side
    682.66x = 462,301.11
  5. Step 5: Solve for x
    x = 462,301.11/682.66
  6. Step 6: Final answer
    x = 677.21

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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.