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Finding the Fourth Proportional to 809,661.20, 1,214,491.80 and 336,102.80

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Solution

The fourth proportional to 809,661.20, 1,214,491.80 and 336,102.80 is: 504,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,661.20 : 1,214,491.80 = 336,102.80 : x
  2. Step 2: Convert to fraction form
    809,661.20/1,214,491.80 = 336,102.80/x
  3. Step 3: Cross multiply
    809,661.20x = 1,214,491.80 × 336,102.80
  4. Step 4: Simplify right side
    809,661.20x = 408,194,094,557.04
  5. Step 5: Solve for x
    x = 408,194,094,557.04/809,661.20
  6. Step 6: Final answer
    x = 504,154.20

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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.