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Finding the Fourth Proportional to 512,219.20, 768,328.80 and 245,842.60

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Solution

The fourth proportional to 512,219.20, 768,328.80 and 245,842.60 is: 368,763.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,219.20 : 768,328.80 = 245,842.60 : x
  2. Step 2: Convert to fraction form
    512,219.20/768,328.80 = 245,842.60/x
  3. Step 3: Cross multiply
    512,219.20x = 768,328.80 × 245,842.60
  4. Step 4: Simplify right side
    512,219.20x = 188,887,949,846.88
  5. Step 5: Solve for x
    x = 188,887,949,846.88/512,219.20
  6. Step 6: Final answer
    x = 368,763.90

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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.