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Finding the Fourth Proportional to 1,156,200, 1,595,556 and 647,000.79

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Solution

The fourth proportional to 1,156,200, 1,595,556 and 647,000.79 is: 892,861.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156,200 : 1,595,556 = 647,000.79 : x
  2. Step 2: Convert to fraction form
    1,156,200/1,595,556 = 647,000.79/x
  3. Step 3: Cross multiply
    1,156,200x = 1,595,556 × 647,000.79
  4. Step 4: Simplify right side
    1,156,200x = 1,032,325,992,489.24
  5. Step 5: Solve for x
    x = 1,032,325,992,489.24/1,156,200
  6. Step 6: Final answer
    x = 892,861.09

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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.