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Finding the Fourth Proportional to 881.88, 1,217.08 and 489.00

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Solution

The fourth proportional to 881.88, 1,217.08 and 489.00 is: 674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.88 : 1,217.08 = 489.00 : x
  2. Step 2: Convert to fraction form
    881.88/1,217.08 = 489.00/x
  3. Step 3: Cross multiply
    881.88x = 1,217.08 × 489.00
  4. Step 4: Simplify right side
    881.88x = 595,155.47
  5. Step 5: Solve for x
    x = 595,155.47/881.88
  6. Step 6: Final answer
    x = 674.87

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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.