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Finding the Fourth Proportional to 647,213.20, 970,819.80 and 529,115.20

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Solution

The fourth proportional to 647,213.20, 970,819.80 and 529,115.20 is: 793,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,213.20 : 970,819.80 = 529,115.20 : x
  2. Step 2: Convert to fraction form
    647,213.20/970,819.80 = 529,115.20/x
  3. Step 3: Cross multiply
    647,213.20x = 970,819.80 × 529,115.20
  4. Step 4: Simplify right side
    647,213.20x = 513,675,512,640.96
  5. Step 5: Solve for x
    x = 513,675,512,640.96/647,213.20
  6. Step 6: Final answer
    x = 793,672.80

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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.