Home / 3,855.06-5,780.16-1,389.42

Finding the Fourth Proportional to 3,855.06, 5,780.16 and 1,389.42

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Solution

The fourth proportional to 3,855.06, 5,780.16 and 1,389.42 is: 2,083.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.06 : 5,780.16 = 1,389.42 : x
  2. Step 2: Convert to fraction form
    3,855.06/5,780.16 = 1,389.42/x
  3. Step 3: Cross multiply
    3,855.06x = 5,780.16 × 1,389.42
  4. Step 4: Simplify right side
    3,855.06x = 8,031,069.91
  5. Step 5: Solve for x
    x = 8,031,069.91/3,855.06
  6. Step 6: Final answer
    x = 2,083.25

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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.