Home / 2,847.08-3,928.82-1,605

Finding the Fourth Proportional to 2,847.08, 3,928.82 and 1,605

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Solution

The fourth proportional to 2,847.08, 3,928.82 and 1,605 is: 2,214.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.08 : 3,928.82 = 1,605 : x
  2. Step 2: Convert to fraction form
    2,847.08/3,928.82 = 1,605/x
  3. Step 3: Cross multiply
    2,847.08x = 3,928.82 × 1,605
  4. Step 4: Simplify right side
    2,847.08x = 6,305,756.10
  5. Step 5: Solve for x
    x = 6,305,756.10/2,847.08
  6. Step 6: Final answer
    x = 2,214.82

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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.