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Finding the Fourth Proportional to 2,538.98, 3,808.35 and 664.88

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Solution

The fourth proportional to 2,538.98, 3,808.35 and 664.88 is: 997.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,538.98 : 3,808.35 = 664.88 : x
  2. Step 2: Convert to fraction form
    2,538.98/3,808.35 = 664.88/x
  3. Step 3: Cross multiply
    2,538.98x = 3,808.35 × 664.88
  4. Step 4: Simplify right side
    2,538.98x = 2,532,095.75
  5. Step 5: Solve for x
    x = 2,532,095.75/2,538.98
  6. Step 6: Final answer
    x = 997.29

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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.