Home / 1,287,824.40-1,931,736.60-1,278,493.20

Finding the Fourth Proportional to 1,287,824.40, 1,931,736.60 and 1,278,493.20

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Solution

The fourth proportional to 1,287,824.40, 1,931,736.60 and 1,278,493.20 is: 1,917,739.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,824.40 : 1,931,736.60 = 1,278,493.20 : x
  2. Step 2: Convert to fraction form
    1,287,824.40/1,931,736.60 = 1,278,493.20/x
  3. Step 3: Cross multiply
    1,287,824.40x = 1,931,736.60 × 1,278,493.20
  4. Step 4: Simplify right side
    1,287,824.40x = 2,469,712,107,291.12
  5. Step 5: Solve for x
    x = 2,469,712,107,291.12/1,287,824.40
  6. Step 6: Final answer
    x = 1,917,739.80

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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.