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Finding the Fourth Proportional to 613,834.56, 847,130.40 and 345,579.84

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Solution

The fourth proportional to 613,834.56, 847,130.40 and 345,579.84 is: 476,921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,834.56 : 847,130.40 = 345,579.84 : x
  2. Step 2: Convert to fraction form
    613,834.56/847,130.40 = 345,579.84/x
  3. Step 3: Cross multiply
    613,834.56x = 847,130.40 × 345,579.84
  4. Step 4: Simplify right side
    613,834.56x = 292,751,188,091.14
  5. Step 5: Solve for x
    x = 292,751,188,091.14/613,834.56
  6. Step 6: Final answer
    x = 476,921.97

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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.