Home / 2,105.68-2,905.85-1,266.87

Finding the Fourth Proportional to 2,105.68, 2,905.85 and 1,266.87

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Solution

The fourth proportional to 2,105.68, 2,905.85 and 1,266.87 is: 1,748.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.68 : 2,905.85 = 1,266.87 : x
  2. Step 2: Convert to fraction form
    2,105.68/2,905.85 = 1,266.87/x
  3. Step 3: Cross multiply
    2,105.68x = 2,905.85 × 1,266.87
  4. Step 4: Simplify right side
    2,105.68x = 3,681,334.19
  5. Step 5: Solve for x
    x = 3,681,334.19/2,105.68
  6. Step 6: Final answer
    x = 1,748.29

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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.