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Finding the Fourth Proportional to 6,479,778.94, 9,721,243.05 and 1,992,054.94

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Solution

The fourth proportional to 6,479,778.94, 9,721,243.05 and 1,992,054.94 is: 2,988,566.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479,778.94 : 9,721,243.05 = 1,992,054.94 : x
  2. Step 2: Convert to fraction form
    6,479,778.94/9,721,243.05 = 1,992,054.94/x
  3. Step 3: Cross multiply
    6,479,778.94x = 9,721,243.05 × 1,992,054.94
  4. Step 4: Simplify right side
    6,479,778.94x = 19,365,250,208,919.86
  5. Step 5: Solve for x
    x = 19,365,250,208,919.86/6,479,778.94
  6. Step 6: Final answer
    x = 2,988,566.49

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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.