Home / 1,911.38-2,867.12-612.86

Finding the Fourth Proportional to 1,911.38, 2,867.12 and 612.86

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Solution

The fourth proportional to 1,911.38, 2,867.12 and 612.86 is: 919.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.38 : 2,867.12 = 612.86 : x
  2. Step 2: Convert to fraction form
    1,911.38/2,867.12 = 612.86/x
  3. Step 3: Cross multiply
    1,911.38x = 2,867.12 × 612.86
  4. Step 4: Simplify right side
    1,911.38x = 1,757,143.16
  5. Step 5: Solve for x
    x = 1,757,143.16/1,911.38
  6. Step 6: Final answer
    x = 919.31

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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.