Home / 1,426.98-2,141.46-811.92

Finding the Fourth Proportional to 1,426.98, 2,141.46 and 811.92

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Solution

The fourth proportional to 1,426.98, 2,141.46 and 811.92 is: 1,218.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.98 : 2,141.46 = 811.92 : x
  2. Step 2: Convert to fraction form
    1,426.98/2,141.46 = 811.92/x
  3. Step 3: Cross multiply
    1,426.98x = 2,141.46 × 811.92
  4. Step 4: Simplify right side
    1,426.98x = 1,738,694.20
  5. Step 5: Solve for x
    x = 1,738,694.20/1,426.98
  6. Step 6: Final answer
    x = 1,218.44

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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.