Home / 1,392.24-2,085.96-979.44

Finding the Fourth Proportional to 1,392.24, 2,085.96 and 979.44

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Solution

The fourth proportional to 1,392.24, 2,085.96 and 979.44 is: 1,467.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.24 : 2,085.96 = 979.44 : x
  2. Step 2: Convert to fraction form
    1,392.24/2,085.96 = 979.44/x
  3. Step 3: Cross multiply
    1,392.24x = 2,085.96 × 979.44
  4. Step 4: Simplify right side
    1,392.24x = 2,043,072.66
  5. Step 5: Solve for x
    x = 2,043,072.66/1,392.24
  6. Step 6: Final answer
    x = 1,467.47

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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.