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Finding the Fourth Proportional to 613,457.80, 920,121.90 and 192,711.40

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Solution

The fourth proportional to 613,457.80, 920,121.90 and 192,711.40 is: 289,046.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,457.80 : 920,121.90 = 192,711.40 : x
  2. Step 2: Convert to fraction form
    613,457.80/920,121.90 = 192,711.40/x
  3. Step 3: Cross multiply
    613,457.80x = 920,121.90 × 192,711.40
  4. Step 4: Simplify right side
    613,457.80x = 177,317,979,519.66
  5. Step 5: Solve for x
    x = 177,317,979,519.66/613,457.80
  6. Step 6: Final answer
    x = 289,046.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.