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Finding the Fourth Proportional to 6,644,830.80, 9,971,911.80 and 2,861,029.20

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Solution

The fourth proportional to 6,644,830.80, 9,971,911.80 and 2,861,029.20 is: 4,293,552.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,644,830.80 : 9,971,911.80 = 2,861,029.20 : x
  2. Step 2: Convert to fraction form
    6,644,830.80/9,971,911.80 = 2,861,029.20/x
  3. Step 3: Cross multiply
    6,644,830.80x = 9,971,911.80 × 2,861,029.20
  4. Step 4: Simplify right side
    6,644,830.80x = 28,529,930,839,624.56
  5. Step 5: Solve for x
    x = 28,529,930,839,624.56/6,644,830.80
  6. Step 6: Final answer
    x = 4,293,552.64

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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.