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Finding the Fourth Proportional to 3,943.94, 5,911.04 and 2,187.45

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Solution

The fourth proportional to 3,943.94, 5,911.04 and 2,187.45 is: 3,278.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.94 : 5,911.04 = 2,187.45 : x
  2. Step 2: Convert to fraction form
    3,943.94/5,911.04 = 2,187.45/x
  3. Step 3: Cross multiply
    3,943.94x = 5,911.04 × 2,187.45
  4. Step 4: Simplify right side
    3,943.94x = 12,930,093.51
  5. Step 5: Solve for x
    x = 12,930,093.51/3,943.94
  6. Step 6: Final answer
    x = 3,278.48

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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.