Home / 3,115.48-4,299.46-1,789.28

Finding the Fourth Proportional to 3,115.48, 4,299.46 and 1,789.28

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Solution

The fourth proportional to 3,115.48, 4,299.46 and 1,789.28 is: 2,469.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.48 : 4,299.46 = 1,789.28 : x
  2. Step 2: Convert to fraction form
    3,115.48/4,299.46 = 1,789.28/x
  3. Step 3: Cross multiply
    3,115.48x = 4,299.46 × 1,789.28
  4. Step 4: Simplify right side
    3,115.48x = 7,692,937.79
  5. Step 5: Solve for x
    x = 7,692,937.79/3,115.48
  6. Step 6: Final answer
    x = 2,469.26

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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.