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Finding the Fourth Proportional to 991,517.54, 1,367,790.54 and 647,554.80

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Solution

The fourth proportional to 991,517.54, 1,367,790.54 and 647,554.80 is: 893,296.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,517.54 : 1,367,790.54 = 647,554.80 : x
  2. Step 2: Convert to fraction form
    991,517.54/1,367,790.54 = 647,554.80/x
  3. Step 3: Cross multiply
    991,517.54x = 1,367,790.54 × 647,554.80
  4. Step 4: Simplify right side
    991,517.54x = 885,719,329,571.59
  5. Step 5: Solve for x
    x = 885,719,329,571.59/991,517.54
  6. Step 6: Final answer
    x = 893,296.68

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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.