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Finding the Fourth Proportional to 643,049.72, 886,896.60 and 413,633.24

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Solution

The fourth proportional to 643,049.72, 886,896.60 and 413,633.24 is: 570,484.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,049.72 : 886,896.60 = 413,633.24 : x
  2. Step 2: Convert to fraction form
    643,049.72/886,896.60 = 413,633.24/x
  3. Step 3: Cross multiply
    643,049.72x = 886,896.60 × 413,633.24
  4. Step 4: Simplify right side
    643,049.72x = 366,849,914,202.98
  5. Step 5: Solve for x
    x = 366,849,914,202.98/643,049.72
  6. Step 6: Final answer
    x = 570,484.53

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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.