Home / 2,380.35-3,285.44-1,385.79

Finding the Fourth Proportional to 2,380.35, 3,285.44 and 1,385.79

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Solution

The fourth proportional to 2,380.35, 3,285.44 and 1,385.79 is: 1,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.35 : 3,285.44 = 1,385.79 : x
  2. Step 2: Convert to fraction form
    2,380.35/3,285.44 = 1,385.79/x
  3. Step 3: Cross multiply
    2,380.35x = 3,285.44 × 1,385.79
  4. Step 4: Simplify right side
    2,380.35x = 4,552,929.90
  5. Step 5: Solve for x
    x = 4,552,929.90/2,380.35
  6. Step 6: Final answer
    x = 1,912.71

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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.