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Finding the Fourth Proportional to 682.08, 1,023.12 and 489.84

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Solution

The fourth proportional to 682.08, 1,023.12 and 489.84 is: 734.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.08 : 1,023.12 = 489.84 : x
  2. Step 2: Convert to fraction form
    682.08/1,023.12 = 489.84/x
  3. Step 3: Cross multiply
    682.08x = 1,023.12 × 489.84
  4. Step 4: Simplify right side
    682.08x = 501,165.10
  5. Step 5: Solve for x
    x = 501,165.10/682.08
  6. Step 6: Final answer
    x = 734.76

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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.