Home / 1,921.62-2,651.87-1,165.28

Finding the Fourth Proportional to 1,921.62, 2,651.87 and 1,165.28

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Solution

The fourth proportional to 1,921.62, 2,651.87 and 1,165.28 is: 1,608.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.62 : 2,651.87 = 1,165.28 : x
  2. Step 2: Convert to fraction form
    1,921.62/2,651.87 = 1,165.28/x
  3. Step 3: Cross multiply
    1,921.62x = 2,651.87 × 1,165.28
  4. Step 4: Simplify right side
    1,921.62x = 3,090,171.88
  5. Step 5: Solve for x
    x = 3,090,171.88/1,921.62
  6. Step 6: Final answer
    x = 1,608.11

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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.