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Finding the Fourth Proportional to 2,689.25, 4,033.38 and 840.41

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Solution

The fourth proportional to 2,689.25, 4,033.38 and 840.41 is: 1,260.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.25 : 4,033.38 = 840.41 : x
  2. Step 2: Convert to fraction form
    2,689.25/4,033.38 = 840.41/x
  3. Step 3: Cross multiply
    2,689.25x = 4,033.38 × 840.41
  4. Step 4: Simplify right side
    2,689.25x = 3,389,692.89
  5. Step 5: Solve for x
    x = 3,389,692.89/2,689.25
  6. Step 6: Final answer
    x = 1,260.46

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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.