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Finding the Fourth Proportional to 1,266,886.80, 1,747,869.84 and 722,629.44

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Solution

The fourth proportional to 1,266,886.80, 1,747,869.84 and 722,629.44 is: 996,981.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266,886.80 : 1,747,869.84 = 722,629.44 : x
  2. Step 2: Convert to fraction form
    1,266,886.80/1,747,869.84 = 722,629.44/x
  3. Step 3: Cross multiply
    1,266,886.80x = 1,747,869.84 × 722,629.44
  4. Step 4: Simplify right side
    1,266,886.80x = 1,263,062,203,672.09
  5. Step 5: Solve for x
    x = 1,263,062,203,672.09/1,266,886.80
  6. Step 6: Final answer
    x = 996,981.11

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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.