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Finding the Fourth Proportional to 682.82, 1,024.40 and 220.65

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Solution

The fourth proportional to 682.82, 1,024.40 and 220.65 is: 331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.82 : 1,024.40 = 220.65 : x
  2. Step 2: Convert to fraction form
    682.82/1,024.40 = 220.65/x
  3. Step 3: Cross multiply
    682.82x = 1,024.40 × 220.65
  4. Step 4: Simplify right side
    682.82x = 226,036.42
  5. Step 5: Solve for x
    x = 226,036.42/682.82
  6. Step 6: Final answer
    x = 331.03

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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.