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Finding the Fourth Proportional to 884.60, 1,326.90 and 576.80

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Solution

The fourth proportional to 884.60, 1,326.90 and 576.80 is: 865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.60 : 1,326.90 = 576.80 : x
  2. Step 2: Convert to fraction form
    884.60/1,326.90 = 576.80/x
  3. Step 3: Cross multiply
    884.60x = 1,326.90 × 576.80
  4. Step 4: Simplify right side
    884.60x = 765,355.92
  5. Step 5: Solve for x
    x = 765,355.92/884.60
  6. Step 6: Final answer
    x = 865.20

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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.