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Finding the Fourth Proportional to 887.28, 1,331 and 626.48

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Solution

The fourth proportional to 887.28, 1,331 and 626.48 is: 939.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.28 : 1,331 = 626.48 : x
  2. Step 2: Convert to fraction form
    887.28/1,331 = 626.48/x
  3. Step 3: Cross multiply
    887.28x = 1,331 × 626.48
  4. Step 4: Simplify right side
    887.28x = 833,844.88
  5. Step 5: Solve for x
    x = 833,844.88/887.28
  6. Step 6: Final answer
    x = 939.78

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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.