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Finding the Fourth Proportional to 660,217.20, 911,553.48 and 445,657.92

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Solution

The fourth proportional to 660,217.20, 911,553.48 and 445,657.92 is: 615,314.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,217.20 : 911,553.48 = 445,657.92 : x
  2. Step 2: Convert to fraction form
    660,217.20/911,553.48 = 445,657.92/x
  3. Step 3: Cross multiply
    660,217.20x = 911,553.48 × 445,657.92
  4. Step 4: Simplify right side
    660,217.20x = 406,241,027,865.56
  5. Step 5: Solve for x
    x = 406,241,027,865.56/660,217.20
  6. Step 6: Final answer
    x = 615,314.21

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Double scale
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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.