Home / 2,780.24-3,832.32-2,189.84

Finding the Fourth Proportional to 2,780.24, 3,832.32 and 2,189.84

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Solution

The fourth proportional to 2,780.24, 3,832.32 and 2,189.84 is: 3,018.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.24 : 3,832.32 = 2,189.84 : x
  2. Step 2: Convert to fraction form
    2,780.24/3,832.32 = 2,189.84/x
  3. Step 3: Cross multiply
    2,780.24x = 3,832.32 × 2,189.84
  4. Step 4: Simplify right side
    2,780.24x = 8,392,167.63
  5. Step 5: Solve for x
    x = 8,392,167.63/2,780.24
  6. Step 6: Final answer
    x = 3,018.50

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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.