Home / 2,755.38-4,126.22-1,929.78

Finding the Fourth Proportional to 2,755.38, 4,126.22 and 1,929.78

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Solution

The fourth proportional to 2,755.38, 4,126.22 and 1,929.78 is: 2,889.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,755.38 : 4,126.22 = 1,929.78 : x
  2. Step 2: Convert to fraction form
    2,755.38/4,126.22 = 1,929.78/x
  3. Step 3: Cross multiply
    2,755.38x = 4,126.22 × 1,929.78
  4. Step 4: Simplify right side
    2,755.38x = 7,962,696.83
  5. Step 5: Solve for x
    x = 7,962,696.83/2,755.38
  6. Step 6: Final answer
    x = 2,889.87

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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.