Home / 3,119.90-4,305.58-1,861.92

Finding the Fourth Proportional to 3,119.90, 4,305.58 and 1,861.92

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Solution

The fourth proportional to 3,119.90, 4,305.58 and 1,861.92 is: 2,569.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.90 : 4,305.58 = 1,861.92 : x
  2. Step 2: Convert to fraction form
    3,119.90/4,305.58 = 1,861.92/x
  3. Step 3: Cross multiply
    3,119.90x = 4,305.58 × 1,861.92
  4. Step 4: Simplify right side
    3,119.90x = 8,016,664.26
  5. Step 5: Solve for x
    x = 8,016,664.26/3,119.90
  6. Step 6: Final answer
    x = 2,569.52

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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.