Home / 1,319.45-1,979.27-394.93

Finding the Fourth Proportional to 1,319.45, 1,979.27 and 394.93

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Solution

The fourth proportional to 1,319.45, 1,979.27 and 394.93 is: 592.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.45 : 1,979.27 = 394.93 : x
  2. Step 2: Convert to fraction form
    1,319.45/1,979.27 = 394.93/x
  3. Step 3: Cross multiply
    1,319.45x = 1,979.27 × 394.93
  4. Step 4: Simplify right side
    1,319.45x = 781,673.10
  5. Step 5: Solve for x
    x = 781,673.10/1,319.45
  6. Step 6: Final answer
    x = 592.42

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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.