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Finding the Fourth Proportional to 1,720.59, 2,375.60 and 1,272.56

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Solution

The fourth proportional to 1,720.59, 2,375.60 and 1,272.56 is: 1,757.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.59 : 2,375.60 = 1,272.56 : x
  2. Step 2: Convert to fraction form
    1,720.59/2,375.60 = 1,272.56/x
  3. Step 3: Cross multiply
    1,720.59x = 2,375.60 × 1,272.56
  4. Step 4: Simplify right side
    1,720.59x = 3,023,093.54
  5. Step 5: Solve for x
    x = 3,023,093.54/1,720.59
  6. Step 6: Final answer
    x = 1,757.01

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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.