Home / 2,815.97-4,223.54-1,172.21

Finding the Fourth Proportional to 2,815.97, 4,223.54 and 1,172.21

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Solution

The fourth proportional to 2,815.97, 4,223.54 and 1,172.21 is: 1,758.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.97 : 4,223.54 = 1,172.21 : x
  2. Step 2: Convert to fraction form
    2,815.97/4,223.54 = 1,172.21/x
  3. Step 3: Cross multiply
    2,815.97x = 4,223.54 × 1,172.21
  4. Step 4: Simplify right side
    2,815.97x = 4,950,857.64
  5. Step 5: Solve for x
    x = 4,950,857.64/2,815.97
  6. Step 6: Final answer
    x = 1,758.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.