Home / 3,423.87-5,140.22-1,781.55

Finding the Fourth Proportional to 3,423.87, 5,140.22 and 1,781.55

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Solution

The fourth proportional to 3,423.87, 5,140.22 and 1,781.55 is: 2,674.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.87 : 5,140.22 = 1,781.55 : x
  2. Step 2: Convert to fraction form
    3,423.87/5,140.22 = 1,781.55/x
  3. Step 3: Cross multiply
    3,423.87x = 5,140.22 × 1,781.55
  4. Step 4: Simplify right side
    3,423.87x = 9,157,550.03
  5. Step 5: Solve for x
    x = 9,157,550.03/3,423.87
  6. Step 6: Final answer
    x = 2,674.62

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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.