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Finding the Fourth Proportional to 1,265,809.65, 1,746,471.87 and 721,747.02

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Solution

The fourth proportional to 1,265,809.65, 1,746,471.87 and 721,747.02 is: 995,813.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265,809.65 : 1,746,471.87 = 721,747.02 : x
  2. Step 2: Convert to fraction form
    1,265,809.65/1,746,471.87 = 721,747.02/x
  3. Step 3: Cross multiply
    1,265,809.65x = 1,746,471.87 × 721,747.02
  4. Step 4: Simplify right side
    1,265,809.65x = 1,260,510,867,686.33
  5. Step 5: Solve for x
    x = 1,260,510,867,686.33/1,265,809.65
  6. Step 6: Final answer
    x = 995,813.92

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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.