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Finding the Fourth Proportional to 820,695, 1,228,519.98 and 699,626.01

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Solution

The fourth proportional to 820,695, 1,228,519.98 and 699,626.01 is: 1,047,288.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,695 : 1,228,519.98 = 699,626.01 : x
  2. Step 2: Convert to fraction form
    820,695/1,228,519.98 = 699,626.01/x
  3. Step 3: Cross multiply
    820,695x = 1,228,519.98 × 699,626.01
  4. Step 4: Simplify right side
    820,695x = 859,504,531,812.68
  5. Step 5: Solve for x
    x = 859,504,531,812.68/820,695
  6. Step 6: Final answer
    x = 1,047,288.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.