Home / 3,115.28-4,298.90-1,789.42

Finding the Fourth Proportional to 3,115.28, 4,298.90 and 1,789.42

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Solution

The fourth proportional to 3,115.28, 4,298.90 and 1,789.42 is: 2,469.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.28 : 4,298.90 = 1,789.42 : x
  2. Step 2: Convert to fraction form
    3,115.28/4,298.90 = 1,789.42/x
  3. Step 3: Cross multiply
    3,115.28x = 4,298.90 × 1,789.42
  4. Step 4: Simplify right side
    3,115.28x = 7,692,537.64
  5. Step 5: Solve for x
    x = 7,692,537.64/3,115.28
  6. Step 6: Final answer
    x = 2,469.29

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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.