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Finding the Fourth Proportional to 2,855.72, 4,276.20 and 2,392.40

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Solution

The fourth proportional to 2,855.72, 4,276.20 and 2,392.40 is: 3,582.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.72 : 4,276.20 = 2,392.40 : x
  2. Step 2: Convert to fraction form
    2,855.72/4,276.20 = 2,392.40/x
  3. Step 3: Cross multiply
    2,855.72x = 4,276.20 × 2,392.40
  4. Step 4: Simplify right side
    2,855.72x = 10,230,380.88
  5. Step 5: Solve for x
    x = 10,230,380.88/2,855.72
  6. Step 6: Final answer
    x = 3,582.42

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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.