Home / 2,313.20-3,469.28-669.35

Finding the Fourth Proportional to 2,313.20, 3,469.28 and 669.35

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Solution

The fourth proportional to 2,313.20, 3,469.28 and 669.35 is: 1,003.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.20 : 3,469.28 = 669.35 : x
  2. Step 2: Convert to fraction form
    2,313.20/3,469.28 = 669.35/x
  3. Step 3: Cross multiply
    2,313.20x = 3,469.28 × 669.35
  4. Step 4: Simplify right side
    2,313.20x = 2,322,141.87
  5. Step 5: Solve for x
    x = 2,322,141.87/2,313.20
  6. Step 6: Final answer
    x = 1,003.87

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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.