Home / 2,115.59-2,919.47-1,330.97

Finding the Fourth Proportional to 2,115.59, 2,919.47 and 1,330.97

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Solution

The fourth proportional to 2,115.59, 2,919.47 and 1,330.97 is: 1,836.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.59 : 2,919.47 = 1,330.97 : x
  2. Step 2: Convert to fraction form
    2,115.59/2,919.47 = 1,330.97/x
  3. Step 3: Cross multiply
    2,115.59x = 2,919.47 × 1,330.97
  4. Step 4: Simplify right side
    2,115.59x = 3,885,705.73
  5. Step 5: Solve for x
    x = 3,885,705.73/2,115.59
  6. Step 6: Final answer
    x = 1,836.71

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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.