Home / 3,856.95-5,781.51-1,391.04

Finding the Fourth Proportional to 3,856.95, 5,781.51 and 1,391.04

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Solution

The fourth proportional to 3,856.95, 5,781.51 and 1,391.04 is: 2,085.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.95 : 5,781.51 = 1,391.04 : x
  2. Step 2: Convert to fraction form
    3,856.95/5,781.51 = 1,391.04/x
  3. Step 3: Cross multiply
    3,856.95x = 5,781.51 × 1,391.04
  4. Step 4: Simplify right side
    3,856.95x = 8,042,311.67
  5. Step 5: Solve for x
    x = 8,042,311.67/3,856.95
  6. Step 6: Final answer
    x = 2,085.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.