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Finding the Fourth Proportional to 512,799.38, 769,199.66 and 133,719.78

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Solution

The fourth proportional to 512,799.38, 769,199.66 and 133,719.78 is: 200,579.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,799.38 : 769,199.66 = 133,719.78 : x
  2. Step 2: Convert to fraction form
    512,799.38/769,199.66 = 133,719.78/x
  3. Step 3: Cross multiply
    512,799.38x = 769,199.66 × 133,719.78
  4. Step 4: Simplify right side
    512,799.38x = 102,857,209,311.28
  5. Step 5: Solve for x
    x = 102,857,209,311.28/512,799.38
  6. Step 6: Final answer
    x = 200,579.82

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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.