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Finding the Fourth Proportional to 620,400.77, 856,101.89 and 344,766.75

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Solution

The fourth proportional to 620,400.77, 856,101.89 and 344,766.75 is: 475,749.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,400.77 : 856,101.89 = 344,766.75 : x
  2. Step 2: Convert to fraction form
    620,400.77/856,101.89 = 344,766.75/x
  3. Step 3: Cross multiply
    620,400.77x = 856,101.89 × 344,766.75
  4. Step 4: Simplify right side
    620,400.77x = 295,155,463,935.69
  5. Step 5: Solve for x
    x = 295,155,463,935.69/620,400.77
  6. Step 6: Final answer
    x = 475,749.67

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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.