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Finding the Fourth Proportional to 644,200.96, 888,854.16 and 389,546.80

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Solution

The fourth proportional to 644,200.96, 888,854.16 and 389,546.80 is: 537,488.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,200.96 : 888,854.16 = 389,546.80 : x
  2. Step 2: Convert to fraction form
    644,200.96/888,854.16 = 389,546.80/x
  3. Step 3: Cross multiply
    644,200.96x = 888,854.16 × 389,546.80
  4. Step 4: Simplify right side
    644,200.96x = 346,250,293,694.69
  5. Step 5: Solve for x
    x = 346,250,293,694.69/644,200.96
  6. Step 6: Final answer
    x = 537,488.01

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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.