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Finding the Fourth Proportional to 512,189.96, 706,822.26 and 285,830.60

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Solution

The fourth proportional to 512,189.96, 706,822.26 and 285,830.60 is: 394,446.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,189.96 : 706,822.26 = 285,830.60 : x
  2. Step 2: Convert to fraction form
    512,189.96/706,822.26 = 285,830.60/x
  3. Step 3: Cross multiply
    512,189.96x = 706,822.26 × 285,830.60
  4. Step 4: Simplify right side
    512,189.96x = 202,031,430,669.16
  5. Step 5: Solve for x
    x = 202,031,430,669.16/512,189.96
  6. Step 6: Final answer
    x = 394,446.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.