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Finding the Fourth Proportional to 805,806.06, 1,111,989.15 and 443,229.90

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Solution

The fourth proportional to 805,806.06, 1,111,989.15 and 443,229.90 is: 611,644.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,806.06 : 1,111,989.15 = 443,229.90 : x
  2. Step 2: Convert to fraction form
    805,806.06/1,111,989.15 = 443,229.90/x
  3. Step 3: Cross multiply
    805,806.06x = 1,111,989.15 × 443,229.90
  4. Step 4: Simplify right side
    805,806.06x = 492,866,839,755.59
  5. Step 5: Solve for x
    x = 492,866,839,755.59/805,806.06
  6. Step 6: Final answer
    x = 611,644.49

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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.