Home / 3,126.83-4,687.49-1,278.20

Finding the Fourth Proportional to 3,126.83, 4,687.49 and 1,278.20

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Solution

The fourth proportional to 3,126.83, 4,687.49 and 1,278.20 is: 1,916.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.83 : 4,687.49 = 1,278.20 : x
  2. Step 2: Convert to fraction form
    3,126.83/4,687.49 = 1,278.20/x
  3. Step 3: Cross multiply
    3,126.83x = 4,687.49 × 1,278.20
  4. Step 4: Simplify right side
    3,126.83x = 5,991,519.89
  5. Step 5: Solve for x
    x = 5,991,519.89/3,126.83
  6. Step 6: Final answer
    x = 1,916.17

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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.