Home / 3,855.97-5,780.45-1,389.04

Finding the Fourth Proportional to 3,855.97, 5,780.45 and 1,389.04

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Solution

The fourth proportional to 3,855.97, 5,780.45 and 1,389.04 is: 2,082.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.97 : 5,780.45 = 1,389.04 : x
  2. Step 2: Convert to fraction form
    3,855.97/5,780.45 = 1,389.04/x
  3. Step 3: Cross multiply
    3,855.97x = 5,780.45 × 1,389.04
  4. Step 4: Simplify right side
    3,855.97x = 8,029,265.29
  5. Step 5: Solve for x
    x = 8,029,265.29/3,855.97
  6. Step 6: Final answer
    x = 2,082.29

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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.