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Finding the Fourth Proportional to 654,057.40, 981,231.90 and 512,339.80

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Solution

The fourth proportional to 654,057.40, 981,231.90 and 512,339.80 is: 768,623.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,057.40 : 981,231.90 = 512,339.80 : x
  2. Step 2: Convert to fraction form
    654,057.40/981,231.90 = 512,339.80/x
  3. Step 3: Cross multiply
    654,057.40x = 981,231.90 × 512,339.80
  4. Step 4: Simplify right side
    654,057.40x = 502,724,155,399.62
  5. Step 5: Solve for x
    x = 502,724,155,399.62/654,057.40
  6. Step 6: Final answer
    x = 768,623.91

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1.5x scale

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.