Home / 681,200.60-1,021,800.90-521,768.30

Finding the Fourth Proportional to 681,200.60, 1,021,800.90 and 521,768.30

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Solution

The fourth proportional to 681,200.60, 1,021,800.90 and 521,768.30 is: 782,652.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,200.60 : 1,021,800.90 = 521,768.30 : x
  2. Step 2: Convert to fraction form
    681,200.60/1,021,800.90 = 521,768.30/x
  3. Step 3: Cross multiply
    681,200.60x = 1,021,800.90 × 521,768.30
  4. Step 4: Simplify right side
    681,200.60x = 533,143,318,531.47
  5. Step 5: Solve for x
    x = 533,143,318,531.47/681,200.60
  6. Step 6: Final answer
    x = 782,652.45

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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.