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Finding the Fourth Proportional to 769,791.80, 1,154,687.70 and 726,246.20

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Solution

The fourth proportional to 769,791.80, 1,154,687.70 and 726,246.20 is: 1,089,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,791.80 : 1,154,687.70 = 726,246.20 : x
  2. Step 2: Convert to fraction form
    769,791.80/1,154,687.70 = 726,246.20/x
  3. Step 3: Cross multiply
    769,791.80x = 1,154,687.70 × 726,246.20
  4. Step 4: Simplify right side
    769,791.80x = 838,587,554,311.74
  5. Step 5: Solve for x
    x = 838,587,554,311.74/769,791.80
  6. Step 6: Final answer
    x = 1,089,369.30

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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.