Home / 2,664.39-3,997.26-815.43

Finding the Fourth Proportional to 2,664.39, 3,997.26 and 815.43

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Solution

The fourth proportional to 2,664.39, 3,997.26 and 815.43 is: 1,223.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,664.39 : 3,997.26 = 815.43 : x
  2. Step 2: Convert to fraction form
    2,664.39/3,997.26 = 815.43/x
  3. Step 3: Cross multiply
    2,664.39x = 3,997.26 × 815.43
  4. Step 4: Simplify right side
    2,664.39x = 3,259,485.72
  5. Step 5: Solve for x
    x = 3,259,485.72/2,664.39
  6. Step 6: Final answer
    x = 1,223.35

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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.