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Finding the Fourth Proportional to 399,641.60, 599,453.95 and 129,769.45

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Solution

The fourth proportional to 399,641.60, 599,453.95 and 129,769.45 is: 194,651.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,641.60 : 599,453.95 = 129,769.45 : x
  2. Step 2: Convert to fraction form
    399,641.60/599,453.95 = 129,769.45/x
  3. Step 3: Cross multiply
    399,641.60x = 599,453.95 × 129,769.45
  4. Step 4: Simplify right side
    399,641.60x = 77,790,805,745.71
  5. Step 5: Solve for x
    x = 77,790,805,745.71/399,641.60
  6. Step 6: Final answer
    x = 194,651.42

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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.