Home / 2,221.32-3,078.39-2,190

Finding the Fourth Proportional to 2,221.32, 3,078.39 and 2,190

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Solution

The fourth proportional to 2,221.32, 3,078.39 and 2,190 is: 3,034.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.32 : 3,078.39 = 2,190 : x
  2. Step 2: Convert to fraction form
    2,221.32/3,078.39 = 2,190/x
  3. Step 3: Cross multiply
    2,221.32x = 3,078.39 × 2,190
  4. Step 4: Simplify right side
    2,221.32x = 6,741,674.10
  5. Step 5: Solve for x
    x = 6,741,674.10/2,221.32
  6. Step 6: Final answer
    x = 3,034.99

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.