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Finding the Fourth Proportional to 6,384,643.70, 9,576,965.55 and 3,991,190.90

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Solution

The fourth proportional to 6,384,643.70, 9,576,965.55 and 3,991,190.90 is: 5,986,786.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,384,643.70 : 9,576,965.55 = 3,991,190.90 : x
  2. Step 2: Convert to fraction form
    6,384,643.70/9,576,965.55 = 3,991,190.90/x
  3. Step 3: Cross multiply
    6,384,643.70x = 9,576,965.55 × 3,991,190.90
  4. Step 4: Simplify right side
    6,384,643.70x = 38,223,497,752,773.50
  5. Step 5: Solve for x
    x = 38,223,497,752,773.50/6,384,643.70
  6. Step 6: Final answer
    x = 5,986,786.35

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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.