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Finding the Fourth Proportional to 988.25, 1,481.23 and 371.56

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Solution

The fourth proportional to 988.25, 1,481.23 and 371.56 is: 556.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.25 : 1,481.23 = 371.56 : x
  2. Step 2: Convert to fraction form
    988.25/1,481.23 = 371.56/x
  3. Step 3: Cross multiply
    988.25x = 1,481.23 × 371.56
  4. Step 4: Simplify right side
    988.25x = 550,367.96
  5. Step 5: Solve for x
    x = 550,367.96/988.25
  6. Step 6: Final answer
    x = 556.91

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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.