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Finding the Fourth Proportional to 670,418.52, 925,181.16 and 394,788.30

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Solution

The fourth proportional to 670,418.52, 925,181.16 and 394,788.30 is: 544,809.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,418.52 : 925,181.16 = 394,788.30 : x
  2. Step 2: Convert to fraction form
    670,418.52/925,181.16 = 394,788.30/x
  3. Step 3: Cross multiply
    670,418.52x = 925,181.16 × 394,788.30
  4. Step 4: Simplify right side
    670,418.52x = 365,250,697,348.43
  5. Step 5: Solve for x
    x = 365,250,697,348.43/670,418.52
  6. Step 6: Final answer
    x = 544,809.98

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Double scale
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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.