Home / 3,115.88-4,289.28-2,722.40

Finding the Fourth Proportional to 3,115.88, 4,289.28 and 2,722.40

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Solution

The fourth proportional to 3,115.88, 4,289.28 and 2,722.40 is: 3,747.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.88 : 4,289.28 = 2,722.40 : x
  2. Step 2: Convert to fraction form
    3,115.88/4,289.28 = 2,722.40/x
  3. Step 3: Cross multiply
    3,115.88x = 4,289.28 × 2,722.40
  4. Step 4: Simplify right side
    3,115.88x = 11,677,135.87
  5. Step 5: Solve for x
    x = 11,677,135.87/3,115.88
  6. Step 6: Final answer
    x = 3,747.62

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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.