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Finding the Fourth Proportional to 664,878.96, 917,599.38 and 396,606.96

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Solution

The fourth proportional to 664,878.96, 917,599.38 and 396,606.96 is: 547,357.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,878.96 : 917,599.38 = 396,606.96 : x
  2. Step 2: Convert to fraction form
    664,878.96/917,599.38 = 396,606.96/x
  3. Step 3: Cross multiply
    664,878.96x = 917,599.38 × 396,606.96
  4. Step 4: Simplify right side
    664,878.96x = 363,926,300,599.69
  5. Step 5: Solve for x
    x = 363,926,300,599.69/664,878.96
  6. Step 6: Final answer
    x = 547,357.22

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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.