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Finding the Fourth Proportional to 882.19, 1,217.33 and 489.14

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Solution

The fourth proportional to 882.19, 1,217.33 and 489.14 is: 674.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.19 : 1,217.33 = 489.14 : x
  2. Step 2: Convert to fraction form
    882.19/1,217.33 = 489.14/x
  3. Step 3: Cross multiply
    882.19x = 1,217.33 × 489.14
  4. Step 4: Simplify right side
    882.19x = 595,442.66
  5. Step 5: Solve for x
    x = 595,442.66/882.19
  6. Step 6: Final answer
    x = 674.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.