Home / 3,903.90-5,855.85-1,438.80

Finding the Fourth Proportional to 3,903.90, 5,855.85 and 1,438.80

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Solution

The fourth proportional to 3,903.90, 5,855.85 and 1,438.80 is: 2,158.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.90 : 5,855.85 = 1,438.80 : x
  2. Step 2: Convert to fraction form
    3,903.90/5,855.85 = 1,438.80/x
  3. Step 3: Cross multiply
    3,903.90x = 5,855.85 × 1,438.80
  4. Step 4: Simplify right side
    3,903.90x = 8,425,396.98
  5. Step 5: Solve for x
    x = 8,425,396.98/3,903.90
  6. Step 6: Final answer
    x = 2,158.20

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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.