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Finding the Fourth Proportional to 3,957.77, 5,461.78 and 2,189.37

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Solution

The fourth proportional to 3,957.77, 5,461.78 and 2,189.37 is: 3,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957.77 : 5,461.78 = 2,189.37 : x
  2. Step 2: Convert to fraction form
    3,957.77/5,461.78 = 2,189.37/x
  3. Step 3: Cross multiply
    3,957.77x = 5,461.78 × 2,189.37
  4. Step 4: Simplify right side
    3,957.77x = 11,957,857.28
  5. Step 5: Solve for x
    x = 11,957,857.28/3,957.77
  6. Step 6: Final answer
    x = 3,021.36

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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.