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Finding the Fourth Proportional to 493,993.70, 681,693.85 and 279,129.16

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Solution

The fourth proportional to 493,993.70, 681,693.85 and 279,129.16 is: 385,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,993.70 : 681,693.85 = 279,129.16 : x
  2. Step 2: Convert to fraction form
    493,993.70/681,693.85 = 279,129.16/x
  3. Step 3: Cross multiply
    493,993.70x = 681,693.85 × 279,129.16
  4. Step 4: Simplify right side
    493,993.70x = 190,280,629,325.61
  5. Step 5: Solve for x
    x = 190,280,629,325.61/493,993.70
  6. Step 6: Final answer
    x = 385,188.37

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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.