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Finding the Fourth Proportional to 1,990.88, 2,747.50 and 1,492.64

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Solution

The fourth proportional to 1,990.88, 2,747.50 and 1,492.64 is: 2,059.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.88 : 2,747.50 = 1,492.64 : x
  2. Step 2: Convert to fraction form
    1,990.88/2,747.50 = 1,492.64/x
  3. Step 3: Cross multiply
    1,990.88x = 2,747.50 × 1,492.64
  4. Step 4: Simplify right side
    1,990.88x = 4,101,028.40
  5. Step 5: Solve for x
    x = 4,101,028.40/1,990.88
  6. Step 6: Final answer
    x = 2,059.91

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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.