Home / 2,947.12-4,066.98-1,620.78

Finding the Fourth Proportional to 2,947.12, 4,066.98 and 1,620.78

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Solution

The fourth proportional to 2,947.12, 4,066.98 and 1,620.78 is: 2,236.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.12 : 4,066.98 = 1,620.78 : x
  2. Step 2: Convert to fraction form
    2,947.12/4,066.98 = 1,620.78/x
  3. Step 3: Cross multiply
    2,947.12x = 4,066.98 × 1,620.78
  4. Step 4: Simplify right side
    2,947.12x = 6,591,679.84
  5. Step 5: Solve for x
    x = 6,591,679.84/2,947.12
  6. Step 6: Final answer
    x = 2,236.65

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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.