Home / 2,278.10-3,145.70-2,011.88

Finding the Fourth Proportional to 2,278.10, 3,145.70 and 2,011.88

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Solution

The fourth proportional to 2,278.10, 3,145.70 and 2,011.88 is: 2,778.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.10 : 3,145.70 = 2,011.88 : x
  2. Step 2: Convert to fraction form
    2,278.10/3,145.70 = 2,011.88/x
  3. Step 3: Cross multiply
    2,278.10x = 3,145.70 × 2,011.88
  4. Step 4: Simplify right side
    2,278.10x = 6,328,770.92
  5. Step 5: Solve for x
    x = 6,328,770.92/2,278.10
  6. Step 6: Final answer
    x = 2,778.09

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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.