Home / 3,728.20-5,592.12-1,388.20

Finding the Fourth Proportional to 3,728.20, 5,592.12 and 1,388.20

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Solution

The fourth proportional to 3,728.20, 5,592.12 and 1,388.20 is: 2,082.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.20 : 5,592.12 = 1,388.20 : x
  2. Step 2: Convert to fraction form
    3,728.20/5,592.12 = 1,388.20/x
  3. Step 3: Cross multiply
    3,728.20x = 5,592.12 × 1,388.20
  4. Step 4: Simplify right side
    3,728.20x = 7,762,980.98
  5. Step 5: Solve for x
    x = 7,762,980.98/3,728.20
  6. Step 6: Final answer
    x = 2,082.23

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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.