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Finding the Fourth Proportional to 2,783.92, 3,833.04 and 2,118.64

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Solution

The fourth proportional to 2,783.92, 3,833.04 and 2,118.64 is: 2,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.92 : 3,833.04 = 2,118.64 : x
  2. Step 2: Convert to fraction form
    2,783.92/3,833.04 = 2,118.64/x
  3. Step 3: Cross multiply
    2,783.92x = 3,833.04 × 2,118.64
  4. Step 4: Simplify right side
    2,783.92x = 8,120,831.87
  5. Step 5: Solve for x
    x = 8,120,831.87/2,783.92
  6. Step 6: Final answer
    x = 2,917.05

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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.