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Finding the Fourth Proportional to 1,998.72, 2,997.74 and 537.55

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Solution

The fourth proportional to 1,998.72, 2,997.74 and 537.55 is: 806.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.72 : 2,997.74 = 537.55 : x
  2. Step 2: Convert to fraction form
    1,998.72/2,997.74 = 537.55/x
  3. Step 3: Cross multiply
    1,998.72x = 2,997.74 × 537.55
  4. Step 4: Simplify right side
    1,998.72x = 1,611,428.99
  5. Step 5: Solve for x
    x = 1,611,428.99/1,998.72
  6. Step 6: Final answer
    x = 806.23

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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.