Home / 3,905.49-5,383.97-2,784.48

Finding the Fourth Proportional to 3,905.49, 5,383.97 and 2,784.48

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Solution

The fourth proportional to 3,905.49, 5,383.97 and 2,784.48 is: 3,838.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.49 : 5,383.97 = 2,784.48 : x
  2. Step 2: Convert to fraction form
    3,905.49/5,383.97 = 2,784.48/x
  3. Step 3: Cross multiply
    3,905.49x = 5,383.97 × 2,784.48
  4. Step 4: Simplify right side
    3,905.49x = 14,991,578.54
  5. Step 5: Solve for x
    x = 14,991,578.54/3,905.49
  6. Step 6: Final answer
    x = 3,838.59

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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.