Home / 2,983.62-4,119.29-1,921.78

Finding the Fourth Proportional to 2,983.62, 4,119.29 and 1,921.78

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Solution

The fourth proportional to 2,983.62, 4,119.29 and 1,921.78 is: 2,653.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,983.62 : 4,119.29 = 1,921.78 : x
  2. Step 2: Convert to fraction form
    2,983.62/4,119.29 = 1,921.78/x
  3. Step 3: Cross multiply
    2,983.62x = 4,119.29 × 1,921.78
  4. Step 4: Simplify right side
    2,983.62x = 7,916,369.14
  5. Step 5: Solve for x
    x = 7,916,369.14/2,983.62
  6. Step 6: Final answer
    x = 2,653.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.