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Finding the Fourth Proportional to 1,324,974.47, 1,828,465.05 and 721,362.47

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Solution

The fourth proportional to 1,324,974.47, 1,828,465.05 and 721,362.47 is: 995,480.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324,974.47 : 1,828,465.05 = 721,362.47 : x
  2. Step 2: Convert to fraction form
    1,324,974.47/1,828,465.05 = 721,362.47/x
  3. Step 3: Cross multiply
    1,324,974.47x = 1,828,465.05 × 721,362.47
  4. Step 4: Simplify right side
    1,324,974.47x = 1,318,986,055,634.35
  5. Step 5: Solve for x
    x = 1,318,986,055,634.35/1,324,974.47
  6. Step 6: Final answer
    x = 995,480.36

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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.