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Finding the Fourth Proportional to 6,391,927.98, 8,820,808.20 and 3,491,320.68

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Solution

The fourth proportional to 6,391,927.98, 8,820,808.20 and 3,491,320.68 is: 4,817,993.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391,927.98 : 8,820,808.20 = 3,491,320.68 : x
  2. Step 2: Convert to fraction form
    6,391,927.98/8,820,808.20 = 3,491,320.68/x
  3. Step 3: Cross multiply
    6,391,927.98x = 8,820,808.20 × 3,491,320.68
  4. Step 4: Simplify right side
    6,391,927.98x = 30,796,270,082,973.57
  5. Step 5: Solve for x
    x = 30,796,270,082,973.57/6,391,927.98
  6. Step 6: Final answer
    x = 4,817,993.91

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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.