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Finding the Fourth Proportional to 2,418.44, 3,627.92 and 774.40

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Solution

The fourth proportional to 2,418.44, 3,627.92 and 774.40 is: 1,161.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,418.44 : 3,627.92 = 774.40 : x
  2. Step 2: Convert to fraction form
    2,418.44/3,627.92 = 774.40/x
  3. Step 3: Cross multiply
    2,418.44x = 3,627.92 × 774.40
  4. Step 4: Simplify right side
    2,418.44x = 2,809,461.25
  5. Step 5: Solve for x
    x = 2,809,461.25/2,418.44
  6. Step 6: Final answer
    x = 1,161.68

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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.