Home / 3,421.92-5,131.44-1,313.20

Finding the Fourth Proportional to 3,421.92, 5,131.44 and 1,313.20

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Solution

The fourth proportional to 3,421.92, 5,131.44 and 1,313.20 is: 1,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.92 : 5,131.44 = 1,313.20 : x
  2. Step 2: Convert to fraction form
    3,421.92/5,131.44 = 1,313.20/x
  3. Step 3: Cross multiply
    3,421.92x = 5,131.44 × 1,313.20
  4. Step 4: Simplify right side
    3,421.92x = 6,738,607.01
  5. Step 5: Solve for x
    x = 6,738,607.01/3,421.92
  6. Step 6: Final answer
    x = 1,969.25

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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.