Home / 1,276.10-1,899.99-1,268.90

Finding the Fourth Proportional to 1,276.10, 1,899.99 and 1,268.90

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Solution

The fourth proportional to 1,276.10, 1,899.99 and 1,268.90 is: 1,889.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.10 : 1,899.99 = 1,268.90 : x
  2. Step 2: Convert to fraction form
    1,276.10/1,899.99 = 1,268.90/x
  3. Step 3: Cross multiply
    1,276.10x = 1,899.99 × 1,268.90
  4. Step 4: Simplify right side
    1,276.10x = 2,410,890.97
  5. Step 5: Solve for x
    x = 2,410,890.97/1,276.10
  6. Step 6: Final answer
    x = 1,889.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.