Home / 1,280,169.28-1,918,906.08-427,012.48

Finding the Fourth Proportional to 1,280,169.28, 1,918,906.08 and 427,012.48

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Solution

The fourth proportional to 1,280,169.28, 1,918,906.08 and 427,012.48 is: 640,069.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,169.28 : 1,918,906.08 = 427,012.48 : x
  2. Step 2: Convert to fraction form
    1,280,169.28/1,918,906.08 = 427,012.48/x
  3. Step 3: Cross multiply
    1,280,169.28x = 1,918,906.08 × 427,012.48
  4. Step 4: Simplify right side
    1,280,169.28x = 819,396,844,107.88
  5. Step 5: Solve for x
    x = 819,396,844,107.88/1,280,169.28
  6. Step 6: Final answer
    x = 640,069.14

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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.