Home / 1,287,830.80-1,933,301.40-1,278,499.60

Finding the Fourth Proportional to 1,287,830.80, 1,933,301.40 and 1,278,499.60

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Solution

The fourth proportional to 1,287,830.80, 1,933,301.40 and 1,278,499.60 is: 1,919,293.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,830.80 : 1,933,301.40 = 1,278,499.60 : x
  2. Step 2: Convert to fraction form
    1,287,830.80/1,933,301.40 = 1,278,499.60/x
  3. Step 3: Cross multiply
    1,287,830.80x = 1,933,301.40 × 1,278,499.60
  4. Step 4: Simplify right side
    1,287,830.80x = 2,471,725,066,579.44
  5. Step 5: Solve for x
    x = 2,471,725,066,579.44/1,287,830.80
  6. Step 6: Final answer
    x = 1,919,293.33

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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.