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Finding the Fourth Proportional to 2,667.43, 3,998.71 and 1,205.78

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Solution

The fourth proportional to 2,667.43, 3,998.71 and 1,205.78 is: 1,807.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,667.43 : 3,998.71 = 1,205.78 : x
  2. Step 2: Convert to fraction form
    2,667.43/3,998.71 = 1,205.78/x
  3. Step 3: Cross multiply
    2,667.43x = 3,998.71 × 1,205.78
  4. Step 4: Simplify right side
    2,667.43x = 4,821,558.51
  5. Step 5: Solve for x
    x = 4,821,558.51/2,667.43
  6. Step 6: Final answer
    x = 1,807.57

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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.