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Finding the Fourth Proportional to 520,039.20, 780,131.70 and 204,422.70

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Solution

The fourth proportional to 520,039.20, 780,131.70 and 204,422.70 is: 306,662.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.20 : 780,131.70 = 204,422.70 : x
  2. Step 2: Convert to fraction form
    520,039.20/780,131.70 = 204,422.70/x
  3. Step 3: Cross multiply
    520,039.20x = 780,131.70 × 204,422.70
  4. Step 4: Simplify right side
    520,039.20x = 159,476,628,469.59
  5. Step 5: Solve for x
    x = 159,476,628,469.59/520,039.20
  6. Step 6: Final answer
    x = 306,662.71

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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.