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Finding the Fourth Proportional to 2,684.80, 4,027.20 and 2,490.40

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Solution

The fourth proportional to 2,684.80, 4,027.20 and 2,490.40 is: 3,735.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,684.80 : 4,027.20 = 2,490.40 : x
  2. Step 2: Convert to fraction form
    2,684.80/4,027.20 = 2,490.40/x
  3. Step 3: Cross multiply
    2,684.80x = 4,027.20 × 2,490.40
  4. Step 4: Simplify right side
    2,684.80x = 10,029,338.88
  5. Step 5: Solve for x
    x = 10,029,338.88/2,684.80
  6. Step 6: Final answer
    x = 3,735.60

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1.5x scale

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.