Home / 1,287,622.20-1,930,665.30-789,343.80

Finding the Fourth Proportional to 1,287,622.20, 1,930,665.30 and 789,343.80

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Solution

The fourth proportional to 1,287,622.20, 1,930,665.30 and 789,343.80 is: 1,183,544.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,622.20 : 1,930,665.30 = 789,343.80 : x
  2. Step 2: Convert to fraction form
    1,287,622.20/1,930,665.30 = 789,343.80/x
  3. Step 3: Cross multiply
    1,287,622.20x = 1,930,665.30 × 789,343.80
  4. Step 4: Simplify right side
    1,287,622.20x = 1,523,958,684,430.14
  5. Step 5: Solve for x
    x = 1,523,958,684,430.14/1,287,622.20
  6. Step 6: Final answer
    x = 1,183,544.90

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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.