Home / 1,319.27-1,979.44-497.78

Finding the Fourth Proportional to 1,319.27, 1,979.44 and 497.78

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Solution

The fourth proportional to 1,319.27, 1,979.44 and 497.78 is: 746.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.27 : 1,979.44 = 497.78 : x
  2. Step 2: Convert to fraction form
    1,319.27/1,979.44 = 497.78/x
  3. Step 3: Cross multiply
    1,319.27x = 1,979.44 × 497.78
  4. Step 4: Simplify right side
    1,319.27x = 985,321.92
  5. Step 5: Solve for x
    x = 985,321.92/1,319.27
  6. Step 6: Final answer
    x = 746.87

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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.