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Finding the Fourth Proportional to 1,086,664.80, 1,629,997.20 and 988,687.20

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Solution

The fourth proportional to 1,086,664.80, 1,629,997.20 and 988,687.20 is: 1,483,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086,664.80 : 1,629,997.20 = 988,687.20 : x
  2. Step 2: Convert to fraction form
    1,086,664.80/1,629,997.20 = 988,687.20/x
  3. Step 3: Cross multiply
    1,086,664.80x = 1,629,997.20 × 988,687.20
  4. Step 4: Simplify right side
    1,086,664.80x = 1,611,557,367,675.84
  5. Step 5: Solve for x
    x = 1,611,557,367,675.84/1,086,664.80
  6. Step 6: Final answer
    x = 1,483,030.80

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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.