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Finding the Fourth Proportional to 887.73, 1,331.67 and 679.80

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Solution

The fourth proportional to 887.73, 1,331.67 and 679.80 is: 1,019.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.73 : 1,331.67 = 679.80 : x
  2. Step 2: Convert to fraction form
    887.73/1,331.67 = 679.80/x
  3. Step 3: Cross multiply
    887.73x = 1,331.67 × 679.80
  4. Step 4: Simplify right side
    887.73x = 905,273.06
  5. Step 5: Solve for x
    x = 905,273.06/887.73
  6. Step 6: Final answer
    x = 1,019.76

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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.