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Finding the Fourth Proportional to 1,857.78, 2,797.68 and 1,617.21

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Solution

The fourth proportional to 1,857.78, 2,797.68 and 1,617.21 is: 2,435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.78 : 2,797.68 = 1,617.21 : x
  2. Step 2: Convert to fraction form
    1,857.78/2,797.68 = 1,617.21/x
  3. Step 3: Cross multiply
    1,857.78x = 2,797.68 × 1,617.21
  4. Step 4: Simplify right side
    1,857.78x = 4,524,436.07
  5. Step 5: Solve for x
    x = 4,524,436.07/1,857.78
  6. Step 6: Final answer
    x = 2,435.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.