Home / 1,278,388.80-1,915,250.40-779,169.60

Finding the Fourth Proportional to 1,278,388.80, 1,915,250.40 and 779,169.60

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Solution

The fourth proportional to 1,278,388.80, 1,915,250.40 and 779,169.60 is: 1,167,332.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,388.80 : 1,915,250.40 = 779,169.60 : x
  2. Step 2: Convert to fraction form
    1,278,388.80/1,915,250.40 = 779,169.60/x
  3. Step 3: Cross multiply
    1,278,388.80x = 1,915,250.40 × 779,169.60
  4. Step 4: Simplify right side
    1,278,388.80x = 1,492,304,888,067.84
  5. Step 5: Solve for x
    x = 1,492,304,888,067.84/1,278,388.80
  6. Step 6: Final answer
    x = 1,167,332.57

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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.