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Finding the Fourth Proportional to 6,899,243.40, 9,451,997.28 and 6,640,661.97

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Solution

The fourth proportional to 6,899,243.40, 9,451,997.28 and 6,640,661.97 is: 9,097,739.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,899,243.40 : 9,451,997.28 = 6,640,661.97 : x
  2. Step 2: Convert to fraction form
    6,899,243.40/9,451,997.28 = 6,640,661.97/x
  3. Step 3: Cross multiply
    6,899,243.40x = 9,451,997.28 × 6,640,661.97
  4. Step 4: Simplify right side
    6,899,243.40x = 62,767,518,877,839.44
  5. Step 5: Solve for x
    x = 62,767,518,877,839.44/6,899,243.40
  6. Step 6: Final answer
    x = 9,097,739.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.