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Finding the Fourth Proportional to 515,859.20, 773,788.80 and 356,426.90

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Solution

The fourth proportional to 515,859.20, 773,788.80 and 356,426.90 is: 534,640.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,859.20 : 773,788.80 = 356,426.90 : x
  2. Step 2: Convert to fraction form
    515,859.20/773,788.80 = 356,426.90/x
  3. Step 3: Cross multiply
    515,859.20x = 773,788.80 × 356,426.90
  4. Step 4: Simplify right side
    515,859.20x = 275,799,143,238.72
  5. Step 5: Solve for x
    x = 275,799,143,238.72/515,859.20
  6. Step 6: Final answer
    x = 534,640.35

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Double scale
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Similar ratio
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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.