Home / 3,151.28-4,729.44-1,420.04

Finding the Fourth Proportional to 3,151.28, 4,729.44 and 1,420.04

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Solution

The fourth proportional to 3,151.28, 4,729.44 and 1,420.04 is: 2,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,151.28 : 4,729.44 = 1,420.04 : x
  2. Step 2: Convert to fraction form
    3,151.28/4,729.44 = 1,420.04/x
  3. Step 3: Cross multiply
    3,151.28x = 4,729.44 × 1,420.04
  4. Step 4: Simplify right side
    3,151.28x = 6,715,993.98
  5. Step 5: Solve for x
    x = 6,715,993.98/3,151.28
  6. Step 6: Final answer
    x = 2,131.20

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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.