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Finding the Fourth Proportional to 682.25, 1,024.90 and 487.73

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Solution

The fourth proportional to 682.25, 1,024.90 and 487.73 is: 732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.25 : 1,024.90 = 487.73 : x
  2. Step 2: Convert to fraction form
    682.25/1,024.90 = 487.73/x
  3. Step 3: Cross multiply
    682.25x = 1,024.90 × 487.73
  4. Step 4: Simplify right side
    682.25x = 499,875.82
  5. Step 5: Solve for x
    x = 499,875.82/682.25
  6. Step 6: Final answer
    x = 732.69

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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.