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Finding the Fourth Proportional to 719,861.40, 993,402.90 and 397,593.59

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Solution

The fourth proportional to 719,861.40, 993,402.90 and 397,593.59 is: 548,675.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,861.40 : 993,402.90 = 397,593.59 : x
  2. Step 2: Convert to fraction form
    719,861.40/993,402.90 = 397,593.59/x
  3. Step 3: Cross multiply
    719,861.40x = 993,402.90 × 397,593.59
  4. Step 4: Simplify right side
    719,861.40x = 394,970,620,360.40
  5. Step 5: Solve for x
    x = 394,970,620,360.40/719,861.40
  6. Step 6: Final answer
    x = 548,675.93

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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.