Home / 2,828.21-4,240.94-979.43

Finding the Fourth Proportional to 2,828.21, 4,240.94 and 979.43

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Solution

The fourth proportional to 2,828.21, 4,240.94 and 979.43 is: 1,468.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,828.21 : 4,240.94 = 979.43 : x
  2. Step 2: Convert to fraction form
    2,828.21/4,240.94 = 979.43/x
  3. Step 3: Cross multiply
    2,828.21x = 4,240.94 × 979.43
  4. Step 4: Simplify right side
    2,828.21x = 4,153,677.76
  5. Step 5: Solve for x
    x = 4,153,677.76/2,828.21
  6. Step 6: Final answer
    x = 1,468.66

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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.