Home / 2,086.70-2,878.20-1,378.62

Finding the Fourth Proportional to 2,086.70, 2,878.20 and 1,378.62

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Solution

The fourth proportional to 2,086.70, 2,878.20 and 1,378.62 is: 1,901.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.70 : 2,878.20 = 1,378.62 : x
  2. Step 2: Convert to fraction form
    2,086.70/2,878.20 = 1,378.62/x
  3. Step 3: Cross multiply
    2,086.70x = 2,878.20 × 1,378.62
  4. Step 4: Simplify right side
    2,086.70x = 3,967,944.08
  5. Step 5: Solve for x
    x = 3,967,944.08/2,086.70
  6. Step 6: Final answer
    x = 1,901.54

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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.