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Finding the Fourth Proportional to 512,187.20, 768,280.80 and 216,660.80

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Solution

The fourth proportional to 512,187.20, 768,280.80 and 216,660.80 is: 324,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,187.20 : 768,280.80 = 216,660.80 : x
  2. Step 2: Convert to fraction form
    512,187.20/768,280.80 = 216,660.80/x
  3. Step 3: Cross multiply
    512,187.20x = 768,280.80 × 216,660.80
  4. Step 4: Simplify right side
    512,187.20x = 166,456,332,752.64
  5. Step 5: Solve for x
    x = 166,456,332,752.64/512,187.20
  6. Step 6: Final answer
    x = 324,991.20

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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.