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Finding the Fourth Proportional to 1,857.62, 2,772.87 and 1,720.58

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Solution

The fourth proportional to 1,857.62, 2,772.87 and 1,720.58 is: 2,568.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.62 : 2,772.87 = 1,720.58 : x
  2. Step 2: Convert to fraction form
    1,857.62/2,772.87 = 1,720.58/x
  3. Step 3: Cross multiply
    1,857.62x = 2,772.87 × 1,720.58
  4. Step 4: Simplify right side
    1,857.62x = 4,770,944.66
  5. Step 5: Solve for x
    x = 4,770,944.66/1,857.62
  6. Step 6: Final answer
    x = 2,568.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.