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Finding the Fourth Proportional to 3,612,687.85, 4,985,577.64 and 1,980,997.90

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Solution

The fourth proportional to 3,612,687.85, 4,985,577.64 and 1,980,997.90 is: 2,733,814.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612,687.85 : 4,985,577.64 = 1,980,997.90 : x
  2. Step 2: Convert to fraction form
    3,612,687.85/4,985,577.64 = 1,980,997.90/x
  3. Step 3: Cross multiply
    3,612,687.85x = 4,985,577.64 × 1,980,997.90
  4. Step 4: Simplify right side
    3,612,687.85x = 9,876,418,825,139.26
  5. Step 5: Solve for x
    x = 9,876,418,825,139.26/3,612,687.85
  6. Step 6: Final answer
    x = 2,733,814.61

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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.