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Finding the Fourth Proportional to 826.74, 1,240.23 and 249.60

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Solution

The fourth proportional to 826.74, 1,240.23 and 249.60 is: 374.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.74 : 1,240.23 = 249.60 : x
  2. Step 2: Convert to fraction form
    826.74/1,240.23 = 249.60/x
  3. Step 3: Cross multiply
    826.74x = 1,240.23 × 249.60
  4. Step 4: Simplify right side
    826.74x = 309,561.41
  5. Step 5: Solve for x
    x = 309,561.41/826.74
  6. Step 6: Final answer
    x = 374.44

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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.