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Finding the Fourth Proportional to 1,226.26, 1,839 and 404.40

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Solution

The fourth proportional to 1,226.26, 1,839 and 404.40 is: 606.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.26 : 1,839 = 404.40 : x
  2. Step 2: Convert to fraction form
    1,226.26/1,839 = 404.40/x
  3. Step 3: Cross multiply
    1,226.26x = 1,839 × 404.40
  4. Step 4: Simplify right side
    1,226.26x = 743,691.60
  5. Step 5: Solve for x
    x = 743,691.60/1,226.26
  6. Step 6: Final answer
    x = 606.47

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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.