Home / 2,172.78-3,257.08-1,651.28

Finding the Fourth Proportional to 2,172.78, 3,257.08 and 1,651.28

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Solution

The fourth proportional to 2,172.78, 3,257.08 and 1,651.28 is: 2,475.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.78 : 3,257.08 = 1,651.28 : x
  2. Step 2: Convert to fraction form
    2,172.78/3,257.08 = 1,651.28/x
  3. Step 3: Cross multiply
    2,172.78x = 3,257.08 × 1,651.28
  4. Step 4: Simplify right side
    2,172.78x = 5,378,330.65
  5. Step 5: Solve for x
    x = 5,378,330.65/2,172.78
  6. Step 6: Final answer
    x = 2,475.32

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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.