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Finding the Fourth Proportional to 1,720.70, 2,372.27 and 1,367.79

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Solution

The fourth proportional to 1,720.70, 2,372.27 and 1,367.79 is: 1,885.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.70 : 2,372.27 = 1,367.79 : x
  2. Step 2: Convert to fraction form
    1,720.70/2,372.27 = 1,367.79/x
  3. Step 3: Cross multiply
    1,720.70x = 2,372.27 × 1,367.79
  4. Step 4: Simplify right side
    1,720.70x = 3,244,760.34
  5. Step 5: Solve for x
    x = 3,244,760.34/1,720.70
  6. Step 6: Final answer
    x = 1,885.73

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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.