Home / 3,978,992.40-5,969,081.16-1,420,008.72

Finding the Fourth Proportional to 3,978,992.40, 5,969,081.16 and 1,420,008.72

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Solution

The fourth proportional to 3,978,992.40, 5,969,081.16 and 1,420,008.72 is: 2,130,224.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978,992.40 : 5,969,081.16 = 1,420,008.72 : x
  2. Step 2: Convert to fraction form
    3,978,992.40/5,969,081.16 = 1,420,008.72/x
  3. Step 3: Cross multiply
    3,978,992.40x = 5,969,081.16 × 1,420,008.72
  4. Step 4: Simplify right side
    3,978,992.40x = 8,476,147,297,587.72
  5. Step 5: Solve for x
    x = 8,476,147,297,587.72/3,978,992.40
  6. Step 6: Final answer
    x = 2,130,224.55

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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.