Home / 1,638.11-2,261.68-1,259.33

Finding the Fourth Proportional to 1,638.11, 2,261.68 and 1,259.33

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Solution

The fourth proportional to 1,638.11, 2,261.68 and 1,259.33 is: 1,738.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.11 : 2,261.68 = 1,259.33 : x
  2. Step 2: Convert to fraction form
    1,638.11/2,261.68 = 1,259.33/x
  3. Step 3: Cross multiply
    1,638.11x = 2,261.68 × 1,259.33
  4. Step 4: Simplify right side
    1,638.11x = 2,848,201.47
  5. Step 5: Solve for x
    x = 2,848,201.47/1,638.11
  6. Step 6: Final answer
    x = 1,738.71

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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.