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Finding the Fourth Proportional to 661,691.10, 993,520.80 and 512,100.30

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Solution

The fourth proportional to 661,691.10, 993,520.80 and 512,100.30 is: 768,912.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,691.10 : 993,520.80 = 512,100.30 : x
  2. Step 2: Convert to fraction form
    661,691.10/993,520.80 = 512,100.30/x
  3. Step 3: Cross multiply
    661,691.10x = 993,520.80 × 512,100.30
  4. Step 4: Simplify right side
    661,691.10x = 508,782,299,736.24
  5. Step 5: Solve for x
    x = 508,782,299,736.24/661,691.10
  6. Step 6: Final answer
    x = 768,912.11

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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.