Home / 748,912.80-1,123,369.20-720,919.20

Finding the Fourth Proportional to 748,912.80, 1,123,369.20 and 720,919.20

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Solution

The fourth proportional to 748,912.80, 1,123,369.20 and 720,919.20 is: 1,081,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    748,912.80 : 1,123,369.20 = 720,919.20 : x
  2. Step 2: Convert to fraction form
    748,912.80/1,123,369.20 = 720,919.20/x
  3. Step 3: Cross multiply
    748,912.80x = 1,123,369.20 × 720,919.20
  4. Step 4: Simplify right side
    748,912.80x = 809,858,424,968.64
  5. Step 5: Solve for x
    x = 809,858,424,968.64/748,912.80
  6. Step 6: Final answer
    x = 1,081,378.80

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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.