Home / 1,540.62-2,125.83-919.50

Finding the Fourth Proportional to 1,540.62, 2,125.83 and 919.50

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Solution

The fourth proportional to 1,540.62, 2,125.83 and 919.50 is: 1,268.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.62 : 2,125.83 = 919.50 : x
  2. Step 2: Convert to fraction form
    1,540.62/2,125.83 = 919.50/x
  3. Step 3: Cross multiply
    1,540.62x = 2,125.83 × 919.50
  4. Step 4: Simplify right side
    1,540.62x = 1,954,700.69
  5. Step 5: Solve for x
    x = 1,954,700.69/1,540.62
  6. Step 6: Final answer
    x = 1,268.78

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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.