Home / 3,977.78-5,489.40-2,406.38

Finding the Fourth Proportional to 3,977.78, 5,489.40 and 2,406.38

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Solution

The fourth proportional to 3,977.78, 5,489.40 and 2,406.38 is: 3,320.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.78 : 5,489.40 = 2,406.38 : x
  2. Step 2: Convert to fraction form
    3,977.78/5,489.40 = 2,406.38/x
  3. Step 3: Cross multiply
    3,977.78x = 5,489.40 × 2,406.38
  4. Step 4: Simplify right side
    3,977.78x = 13,209,582.37
  5. Step 5: Solve for x
    x = 13,209,582.37/3,977.78
  6. Step 6: Final answer
    x = 3,320.84

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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.