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Finding the Fourth Proportional to 764,793.90, 1,147,190.85 and 680,813.10

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Solution

The fourth proportional to 764,793.90, 1,147,190.85 and 680,813.10 is: 1,021,219.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,793.90 : 1,147,190.85 = 680,813.10 : x
  2. Step 2: Convert to fraction form
    764,793.90/1,147,190.85 = 680,813.10/x
  3. Step 3: Cross multiply
    764,793.90x = 1,147,190.85 × 680,813.10
  4. Step 4: Simplify right side
    764,793.90x = 781,022,558,880.14
  5. Step 5: Solve for x
    x = 781,022,558,880.14/764,793.90
  6. Step 6: Final answer
    x = 1,021,219.65

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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.