Home / 1,921.11-2,653.34-1,422.87

Finding the Fourth Proportional to 1,921.11, 2,653.34 and 1,422.87

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Solution

The fourth proportional to 1,921.11, 2,653.34 and 1,422.87 is: 1,965.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.11 : 2,653.34 = 1,422.87 : x
  2. Step 2: Convert to fraction form
    1,921.11/2,653.34 = 1,422.87/x
  3. Step 3: Cross multiply
    1,921.11x = 2,653.34 × 1,422.87
  4. Step 4: Simplify right side
    1,921.11x = 3,775,350.77
  5. Step 5: Solve for x
    x = 3,775,350.77/1,921.11
  6. Step 6: Final answer
    x = 1,965.19

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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.