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Finding the Fourth Proportional to 4,991,893.92, 6,888,814.56 and 2,816,899.20

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Solution

The fourth proportional to 4,991,893.92, 6,888,814.56 and 2,816,899.20 is: 3,887,321.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991,893.92 : 6,888,814.56 = 2,816,899.20 : x
  2. Step 2: Convert to fraction form
    4,991,893.92/6,888,814.56 = 2,816,899.20/x
  3. Step 3: Cross multiply
    4,991,893.92x = 6,888,814.56 × 2,816,899.20
  4. Step 4: Simplify right side
    4,991,893.92x = 19,405,096,223,012.35
  5. Step 5: Solve for x
    x = 19,405,096,223,012.35/4,991,893.92
  6. Step 6: Final answer
    x = 3,887,321.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.