Home / 1,319.44-1,979.09-394.96

Finding the Fourth Proportional to 1,319.44, 1,979.09 and 394.96

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Solution

The fourth proportional to 1,319.44, 1,979.09 and 394.96 is: 592.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.44 : 1,979.09 = 394.96 : x
  2. Step 2: Convert to fraction form
    1,319.44/1,979.09 = 394.96/x
  3. Step 3: Cross multiply
    1,319.44x = 1,979.09 × 394.96
  4. Step 4: Simplify right side
    1,319.44x = 781,649.52
  5. Step 5: Solve for x
    x = 781,649.52/1,319.44
  6. Step 6: Final answer
    x = 592.41

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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.