Home / 3,855.09-5,782.11-1,389.57

Finding the Fourth Proportional to 3,855.09, 5,782.11 and 1,389.57

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Solution

The fourth proportional to 3,855.09, 5,782.11 and 1,389.57 is: 2,084.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.09 : 5,782.11 = 1,389.57 : x
  2. Step 2: Convert to fraction form
    3,855.09/5,782.11 = 1,389.57/x
  3. Step 3: Cross multiply
    3,855.09x = 5,782.11 × 1,389.57
  4. Step 4: Simplify right side
    3,855.09x = 8,034,646.59
  5. Step 5: Solve for x
    x = 8,034,646.59/3,855.09
  6. Step 6: Final answer
    x = 2,084.17

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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.