Home / 1,508.12-2,081.26-919.08

Finding the Fourth Proportional to 1,508.12, 2,081.26 and 919.08

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Solution

The fourth proportional to 1,508.12, 2,081.26 and 919.08 is: 1,268.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508.12 : 2,081.26 = 919.08 : x
  2. Step 2: Convert to fraction form
    1,508.12/2,081.26 = 919.08/x
  3. Step 3: Cross multiply
    1,508.12x = 2,081.26 × 919.08
  4. Step 4: Simplify right side
    1,508.12x = 1,912,844.44
  5. Step 5: Solve for x
    x = 1,912,844.44/1,508.12
  6. Step 6: Final answer
    x = 1,268.36

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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.