Home / 1,278,566.40-1,915,315.20-1,120,972.80

Finding the Fourth Proportional to 1,278,566.40, 1,915,315.20 and 1,120,972.80

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Solution

The fourth proportional to 1,278,566.40, 1,915,315.20 and 1,120,972.80 is: 1,679,237.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,566.40 : 1,915,315.20 = 1,120,972.80 : x
  2. Step 2: Convert to fraction form
    1,278,566.40/1,915,315.20 = 1,120,972.80/x
  3. Step 3: Cross multiply
    1,278,566.40x = 1,915,315.20 × 1,120,972.80
  4. Step 4: Simplify right side
    1,278,566.40x = 2,147,016,242,626.56
  5. Step 5: Solve for x
    x = 2,147,016,242,626.56/1,278,566.40
  6. Step 6: Final answer
    x = 1,679,237.19

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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.