Home / 2,145.76-3,219.54-913.44

Finding the Fourth Proportional to 2,145.76, 3,219.54 and 913.44

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Solution

The fourth proportional to 2,145.76, 3,219.54 and 913.44 is: 1,370.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.76 : 3,219.54 = 913.44 : x
  2. Step 2: Convert to fraction form
    2,145.76/3,219.54 = 913.44/x
  3. Step 3: Cross multiply
    2,145.76x = 3,219.54 × 913.44
  4. Step 4: Simplify right side
    2,145.76x = 2,940,856.62
  5. Step 5: Solve for x
    x = 2,940,856.62/2,145.76
  6. Step 6: Final answer
    x = 1,370.54

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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.