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Finding the Fourth Proportional to 1,297,769.43, 1,790,661.72 and 724,721.43

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Solution

The fourth proportional to 1,297,769.43, 1,790,661.72 and 724,721.43 is: 999,970.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,769.43 : 1,790,661.72 = 724,721.43 : x
  2. Step 2: Convert to fraction form
    1,297,769.43/1,790,661.72 = 724,721.43/x
  3. Step 3: Cross multiply
    1,297,769.43x = 1,790,661.72 × 724,721.43
  4. Step 4: Simplify right side
    1,297,769.43x = 1,297,730,922,364.66
  5. Step 5: Solve for x
    x = 1,297,730,922,364.66/1,297,769.43
  6. Step 6: Final answer
    x = 999,970.33

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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.