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Finding the Fourth Proportional to 3,855.05, 5,779.03 and 1,389.27

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Solution

The fourth proportional to 3,855.05, 5,779.03 and 1,389.27 is: 2,082.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.05 : 5,779.03 = 1,389.27 : x
  2. Step 2: Convert to fraction form
    3,855.05/5,779.03 = 1,389.27/x
  3. Step 3: Cross multiply
    3,855.05x = 5,779.03 × 1,389.27
  4. Step 4: Simplify right side
    3,855.05x = 8,028,613.07
  5. Step 5: Solve for x
    x = 8,028,613.07/3,855.05
  6. Step 6: Final answer
    x = 2,082.62

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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.