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Finding the Fourth Proportional to 882.08, 1,217.28 and 489.11

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Solution

The fourth proportional to 882.08, 1,217.28 and 489.11 is: 674.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.08 : 1,217.28 = 489.11 : x
  2. Step 2: Convert to fraction form
    882.08/1,217.28 = 489.11/x
  3. Step 3: Cross multiply
    882.08x = 1,217.28 × 489.11
  4. Step 4: Simplify right side
    882.08x = 595,383.82
  5. Step 5: Solve for x
    x = 595,383.82/882.08
  6. Step 6: Final answer
    x = 674.98

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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.