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Finding the Fourth Proportional to 889.44, 1,227.24 and 641.31

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Solution

The fourth proportional to 889.44, 1,227.24 and 641.31 is: 884.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.44 : 1,227.24 = 641.31 : x
  2. Step 2: Convert to fraction form
    889.44/1,227.24 = 641.31/x
  3. Step 3: Cross multiply
    889.44x = 1,227.24 × 641.31
  4. Step 4: Simplify right side
    889.44x = 787,041.28
  5. Step 5: Solve for x
    x = 787,041.28/889.44
  6. Step 6: Final answer
    x = 884.87

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Double scale
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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.