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Finding the Fourth Proportional to 620,543.70, 856,321.47 and 344,888.73

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Solution

The fourth proportional to 620,543.70, 856,321.47 and 344,888.73 is: 475,930.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,543.70 : 856,321.47 = 344,888.73 : x
  2. Step 2: Convert to fraction form
    620,543.70/856,321.47 = 344,888.73/x
  3. Step 3: Cross multiply
    620,543.70x = 856,321.47 × 344,888.73
  4. Step 4: Simplify right side
    620,543.70x = 295,335,624,260.03
  5. Step 5: Solve for x
    x = 295,335,624,260.03/620,543.70
  6. Step 6: Final answer
    x = 475,930.42

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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.