Home / 3,900.89-5,383.64-2,308.07

Finding the Fourth Proportional to 3,900.89, 5,383.64 and 2,308.07

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Solution

The fourth proportional to 3,900.89, 5,383.64 and 2,308.07 is: 3,185.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.89 : 5,383.64 = 2,308.07 : x
  2. Step 2: Convert to fraction form
    3,900.89/5,383.64 = 2,308.07/x
  3. Step 3: Cross multiply
    3,900.89x = 5,383.64 × 2,308.07
  4. Step 4: Simplify right side
    3,900.89x = 12,425,837.20
  5. Step 5: Solve for x
    x = 12,425,837.20/3,900.89
  6. Step 6: Final answer
    x = 3,185.38

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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.