Home / 1,319.28-1,979.27-497.79

Finding the Fourth Proportional to 1,319.28, 1,979.27 and 497.79

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Solution

The fourth proportional to 1,319.28, 1,979.27 and 497.79 is: 746.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.28 : 1,979.27 = 497.79 : x
  2. Step 2: Convert to fraction form
    1,319.28/1,979.27 = 497.79/x
  3. Step 3: Cross multiply
    1,319.28x = 1,979.27 × 497.79
  4. Step 4: Simplify right side
    1,319.28x = 985,258.32
  5. Step 5: Solve for x
    x = 985,258.32/1,319.28
  6. Step 6: Final answer
    x = 746.82

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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.