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Finding the Fourth Proportional to 512,213.70, 768,320.55 and 245,837.10

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Solution

The fourth proportional to 512,213.70, 768,320.55 and 245,837.10 is: 368,755.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,213.70 : 768,320.55 = 245,837.10 : x
  2. Step 2: Convert to fraction form
    512,213.70/768,320.55 = 245,837.10/x
  3. Step 3: Cross multiply
    512,213.70x = 768,320.55 × 245,837.10
  4. Step 4: Simplify right side
    512,213.70x = 188,881,695,882.41
  5. Step 5: Solve for x
    x = 188,881,695,882.41/512,213.70
  6. Step 6: Final answer
    x = 368,755.65

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Similar ratio
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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.