Home / 2,115.52-2,919.26-1,231.18

Finding the Fourth Proportional to 2,115.52, 2,919.26 and 1,231.18

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Solution

The fourth proportional to 2,115.52, 2,919.26 and 1,231.18 is: 1,698.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.52 : 2,919.26 = 1,231.18 : x
  2. Step 2: Convert to fraction form
    2,115.52/2,919.26 = 1,231.18/x
  3. Step 3: Cross multiply
    2,115.52x = 2,919.26 × 1,231.18
  4. Step 4: Simplify right side
    2,115.52x = 3,594,134.53
  5. Step 5: Solve for x
    x = 3,594,134.53/2,115.52
  6. Step 6: Final answer
    x = 1,698.94

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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.