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Finding the Fourth Proportional to 512,847.20, 769,270.80 and 371,129.60

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Solution

The fourth proportional to 512,847.20, 769,270.80 and 371,129.60 is: 556,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,847.20 : 769,270.80 = 371,129.60 : x
  2. Step 2: Convert to fraction form
    512,847.20/769,270.80 = 371,129.60/x
  3. Step 3: Cross multiply
    512,847.20x = 769,270.80 × 371,129.60
  4. Step 4: Simplify right side
    512,847.20x = 285,499,164,295.68
  5. Step 5: Solve for x
    x = 285,499,164,295.68/512,847.20
  6. Step 6: Final answer
    x = 556,694.40

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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.