Home / 3,104.46-4,282.78-1,985

Finding the Fourth Proportional to 3,104.46, 4,282.78 and 1,985

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Solution

The fourth proportional to 3,104.46, 4,282.78 and 1,985 is: 2,738.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,104.46 : 4,282.78 = 1,985 : x
  2. Step 2: Convert to fraction form
    3,104.46/4,282.78 = 1,985/x
  3. Step 3: Cross multiply
    3,104.46x = 4,282.78 × 1,985
  4. Step 4: Simplify right side
    3,104.46x = 8,501,318.30
  5. Step 5: Solve for x
    x = 8,501,318.30/3,104.46
  6. Step 6: Final answer
    x = 2,738.42

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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.