Home / 2,285.78-3,428.46-1,115.33

Finding the Fourth Proportional to 2,285.78, 3,428.46 and 1,115.33

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Solution

The fourth proportional to 2,285.78, 3,428.46 and 1,115.33 is: 1,672.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.78 : 3,428.46 = 1,115.33 : x
  2. Step 2: Convert to fraction form
    2,285.78/3,428.46 = 1,115.33/x
  3. Step 3: Cross multiply
    2,285.78x = 3,428.46 × 1,115.33
  4. Step 4: Simplify right side
    2,285.78x = 3,823,847.15
  5. Step 5: Solve for x
    x = 3,823,847.15/2,285.78
  6. Step 6: Final answer
    x = 1,672.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.