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Finding the Fourth Proportional to 5,438,930.83, 7,505,728.40 and 2,991,728.07

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Solution

The fourth proportional to 5,438,930.83, 7,505,728.40 and 2,991,728.07 is: 4,128,586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,438,930.83 : 7,505,728.40 = 2,991,728.07 : x
  2. Step 2: Convert to fraction form
    5,438,930.83/7,505,728.40 = 2,991,728.07/x
  3. Step 3: Cross multiply
    5,438,930.83x = 7,505,728.40 × 2,991,728.07
  4. Step 4: Simplify right side
    5,438,930.83x = 22,455,098,340,076.19
  5. Step 5: Solve for x
    x = 22,455,098,340,076.19/5,438,930.83
  6. Step 6: Final answer
    x = 4,128,586.86

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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.