Home / 2,811.79-4,220.26-1,426.09

Finding the Fourth Proportional to 2,811.79, 4,220.26 and 1,426.09

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Solution

The fourth proportional to 2,811.79, 4,220.26 and 1,426.09 is: 2,140.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.79 : 4,220.26 = 1,426.09 : x
  2. Step 2: Convert to fraction form
    2,811.79/4,220.26 = 1,426.09/x
  3. Step 3: Cross multiply
    2,811.79x = 4,220.26 × 1,426.09
  4. Step 4: Simplify right side
    2,811.79x = 6,018,449.48
  5. Step 5: Solve for x
    x = 6,018,449.48/2,811.79
  6. Step 6: Final answer
    x = 2,140.43

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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.