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Finding the Fourth Proportional to 6,486,229.71, 9,721,745.15 and 2,645,655.21

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Solution

The fourth proportional to 6,486,229.71, 9,721,745.15 and 2,645,655.21 is: 3,965,383.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,486,229.71 : 9,721,745.15 = 2,645,655.21 : x
  2. Step 2: Convert to fraction form
    6,486,229.71/9,721,745.15 = 2,645,655.21/x
  3. Step 3: Cross multiply
    6,486,229.71x = 9,721,745.15 × 2,645,655.21
  4. Step 4: Simplify right side
    6,486,229.71x = 25,720,385,693,161.45
  5. Step 5: Solve for x
    x = 25,720,385,693,161.45/6,486,229.71
  6. Step 6: Final answer
    x = 3,965,383.10

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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.