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Finding the Fourth Proportional to 719,284.11, 992,609.98 and 396,991.90

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Solution

The fourth proportional to 719,284.11, 992,609.98 and 396,991.90 is: 547,847.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,284.11 : 992,609.98 = 396,991.90 : x
  2. Step 2: Convert to fraction form
    719,284.11/992,609.98 = 396,991.90/x
  3. Step 3: Cross multiply
    719,284.11x = 992,609.98 × 396,991.90
  4. Step 4: Simplify right side
    719,284.11x = 394,058,121,919.16
  5. Step 5: Solve for x
    x = 394,058,121,919.16/719,284.11
  6. Step 6: Final answer
    x = 547,847.67

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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.