Home / 3,110.24-4,290.90-2,165.78

Finding the Fourth Proportional to 3,110.24, 4,290.90 and 2,165.78

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Solution

The fourth proportional to 3,110.24, 4,290.90 and 2,165.78 is: 2,987.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.24 : 4,290.90 = 2,165.78 : x
  2. Step 2: Convert to fraction form
    3,110.24/4,290.90 = 2,165.78/x
  3. Step 3: Cross multiply
    3,110.24x = 4,290.90 × 2,165.78
  4. Step 4: Simplify right side
    3,110.24x = 9,293,145.40
  5. Step 5: Solve for x
    x = 9,293,145.40/3,110.24
  6. Step 6: Final answer
    x = 2,987.92

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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.