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Finding the Fourth Proportional to 643,758.72, 887,769.90 and 385,594.44

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Solution

The fourth proportional to 643,758.72, 887,769.90 and 385,594.44 is: 531,750.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,758.72 : 887,769.90 = 385,594.44 : x
  2. Step 2: Convert to fraction form
    643,758.72/887,769.90 = 385,594.44/x
  3. Step 3: Cross multiply
    643,758.72x = 887,769.90 × 385,594.44
  4. Step 4: Simplify right side
    643,758.72x = 342,319,137,439.36
  5. Step 5: Solve for x
    x = 342,319,137,439.36/643,758.72
  6. Step 6: Final answer
    x = 531,750.68

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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.