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Finding the Fourth Proportional to 3,991,796.55, 5,986,218.60 and 1,296,209.70

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Solution

The fourth proportional to 3,991,796.55, 5,986,218.60 and 1,296,209.70 is: 1,943,835.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991,796.55 : 5,986,218.60 = 1,296,209.70 : x
  2. Step 2: Convert to fraction form
    3,991,796.55/5,986,218.60 = 1,296,209.70/x
  3. Step 3: Cross multiply
    3,991,796.55x = 5,986,218.60 × 1,296,209.70
  4. Step 4: Simplify right side
    3,991,796.55x = 7,759,394,615,640.42
  5. Step 5: Solve for x
    x = 7,759,394,615,640.42/3,991,796.55
  6. Step 6: Final answer
    x = 1,943,835.19

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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.