Home / 1,330,120.80-1,992,992.40-768,175.20

Finding the Fourth Proportional to 1,330,120.80, 1,992,992.40 and 768,175.20

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Solution

The fourth proportional to 1,330,120.80, 1,992,992.40 and 768,175.20 is: 1,150,998.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330,120.80 : 1,992,992.40 = 768,175.20 : x
  2. Step 2: Convert to fraction form
    1,330,120.80/1,992,992.40 = 768,175.20/x
  3. Step 3: Cross multiply
    1,330,120.80x = 1,992,992.40 × 768,175.20
  4. Step 4: Simplify right side
    1,330,120.80x = 1,530,967,335,468.48
  5. Step 5: Solve for x
    x = 1,530,967,335,468.48/1,330,120.80
  6. Step 6: Final answer
    x = 1,150,998.72

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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.