Home / 1,206,006.80-1,809,010.20-639,136.40

Finding the Fourth Proportional to 1,206,006.80, 1,809,010.20 and 639,136.40

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Solution

The fourth proportional to 1,206,006.80, 1,809,010.20 and 639,136.40 is: 958,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,006.80 : 1,809,010.20 = 639,136.40 : x
  2. Step 2: Convert to fraction form
    1,206,006.80/1,809,010.20 = 639,136.40/x
  3. Step 3: Cross multiply
    1,206,006.80x = 1,809,010.20 × 639,136.40
  4. Step 4: Simplify right side
    1,206,006.80x = 1,156,204,266,791.28
  5. Step 5: Solve for x
    x = 1,156,204,266,791.28/1,206,006.80
  6. Step 6: Final answer
    x = 958,704.60

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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.