Home / 2,156.44-2,976.30-1,371.40

Finding the Fourth Proportional to 2,156.44, 2,976.30 and 1,371.40

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Solution

The fourth proportional to 2,156.44, 2,976.30 and 1,371.40 is: 1,892.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.44 : 2,976.30 = 1,371.40 : x
  2. Step 2: Convert to fraction form
    2,156.44/2,976.30 = 1,371.40/x
  3. Step 3: Cross multiply
    2,156.44x = 2,976.30 × 1,371.40
  4. Step 4: Simplify right side
    2,156.44x = 4,081,697.82
  5. Step 5: Solve for x
    x = 4,081,697.82/2,156.44
  6. Step 6: Final answer
    x = 1,892.79

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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.