Home / 3,119.99-4,305.15-2,649.78

Finding the Fourth Proportional to 3,119.99, 4,305.15 and 2,649.78

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Solution

The fourth proportional to 3,119.99, 4,305.15 and 2,649.78 is: 3,656.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.99 : 4,305.15 = 2,649.78 : x
  2. Step 2: Convert to fraction form
    3,119.99/4,305.15 = 2,649.78/x
  3. Step 3: Cross multiply
    3,119.99x = 4,305.15 × 2,649.78
  4. Step 4: Simplify right side
    3,119.99x = 11,407,700.37
  5. Step 5: Solve for x
    x = 11,407,700.37/3,119.99
  6. Step 6: Final answer
    x = 3,656.33

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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.