Home / 3,115.26-4,660.74-2,138.40

Finding the Fourth Proportional to 3,115.26, 4,660.74 and 2,138.40

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Solution

The fourth proportional to 3,115.26, 4,660.74 and 2,138.40 is: 3,199.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.26 : 4,660.74 = 2,138.40 : x
  2. Step 2: Convert to fraction form
    3,115.26/4,660.74 = 2,138.40/x
  3. Step 3: Cross multiply
    3,115.26x = 4,660.74 × 2,138.40
  4. Step 4: Simplify right side
    3,115.26x = 9,966,526.42
  5. Step 5: Solve for x
    x = 9,966,526.42/3,115.26
  6. Step 6: Final answer
    x = 3,199.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.