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Finding the Fourth Proportional to 6,408.40, 8,843.88 and 4,280.20

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Solution

The fourth proportional to 6,408.40, 8,843.88 and 4,280.20 is: 5,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,408.40 : 8,843.88 = 4,280.20 : x
  2. Step 2: Convert to fraction form
    6,408.40/8,843.88 = 4,280.20/x
  3. Step 3: Cross multiply
    6,408.40x = 8,843.88 × 4,280.20
  4. Step 4: Simplify right side
    6,408.40x = 37,853,575.18
  5. Step 5: Solve for x
    x = 37,853,575.18/6,408.40
  6. Step 6: Final answer
    x = 5,906.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.