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Finding the Fourth Proportional to 515,848.20, 773,772.30 and 356,415.90

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Solution

The fourth proportional to 515,848.20, 773,772.30 and 356,415.90 is: 534,623.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,848.20 : 773,772.30 = 356,415.90 : x
  2. Step 2: Convert to fraction form
    515,848.20/773,772.30 = 356,415.90/x
  3. Step 3: Cross multiply
    515,848.20x = 773,772.30 × 356,415.90
  4. Step 4: Simplify right side
    515,848.20x = 275,784,750,699.57
  5. Step 5: Solve for x
    x = 275,784,750,699.57/515,848.20
  6. Step 6: Final answer
    x = 534,623.85

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Half scale
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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.