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Finding the Fourth Proportional to 218,511.20, 327,843.60 and 210,831.20

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Solution

The fourth proportional to 218,511.20, 327,843.60 and 210,831.20 is: 316,320.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,511.20 : 327,843.60 = 210,831.20 : x
  2. Step 2: Convert to fraction form
    218,511.20/327,843.60 = 210,831.20/x
  3. Step 3: Cross multiply
    218,511.20x = 327,843.60 × 210,831.20
  4. Step 4: Simplify right side
    218,511.20x = 69,119,659,600.32
  5. Step 5: Solve for x
    x = 69,119,659,600.32/218,511.20
  6. Step 6: Final answer
    x = 316,320.90

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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.