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Finding the Fourth Proportional to 1,720.72, 2,375.14 and 1,099.72

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Solution

The fourth proportional to 1,720.72, 2,375.14 and 1,099.72 is: 1,517.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.72 : 2,375.14 = 1,099.72 : x
  2. Step 2: Convert to fraction form
    1,720.72/2,375.14 = 1,099.72/x
  3. Step 3: Cross multiply
    1,720.72x = 2,375.14 × 1,099.72
  4. Step 4: Simplify right side
    1,720.72x = 2,611,988.96
  5. Step 5: Solve for x
    x = 2,611,988.96/1,720.72
  6. Step 6: Final answer
    x = 1,517.96

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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.