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Finding the Fourth Proportional to 2,143.87, 3,213.37 and 910.51

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Solution

The fourth proportional to 2,143.87, 3,213.37 and 910.51 is: 1,364.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.87 : 3,213.37 = 910.51 : x
  2. Step 2: Convert to fraction form
    2,143.87/3,213.37 = 910.51/x
  3. Step 3: Cross multiply
    2,143.87x = 3,213.37 × 910.51
  4. Step 4: Simplify right side
    2,143.87x = 2,925,805.52
  5. Step 5: Solve for x
    x = 2,925,805.52/2,143.87
  6. Step 6: Final answer
    x = 1,364.73

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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.