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Finding the Fourth Proportional to 613,976.87, 847,285.95 and 342,028.69

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Solution

The fourth proportional to 613,976.87, 847,285.95 and 342,028.69 is: 471,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,976.87 : 847,285.95 = 342,028.69 : x
  2. Step 2: Convert to fraction form
    613,976.87/847,285.95 = 342,028.69/x
  3. Step 3: Cross multiply
    613,976.87x = 847,285.95 × 342,028.69
  4. Step 4: Simplify right side
    613,976.87x = 289,796,102,698.30
  5. Step 5: Solve for x
    x = 289,796,102,698.30/613,976.87
  6. Step 6: Final answer
    x = 471,998.40

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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.