Home / 1,979.43-2,969.15-518.58

Finding the Fourth Proportional to 1,979.43, 2,969.15 and 518.58

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Solution

The fourth proportional to 1,979.43, 2,969.15 and 518.58 is: 777.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.43 : 2,969.15 = 518.58 : x
  2. Step 2: Convert to fraction form
    1,979.43/2,969.15 = 518.58/x
  3. Step 3: Cross multiply
    1,979.43x = 2,969.15 × 518.58
  4. Step 4: Simplify right side
    1,979.43x = 1,539,739.21
  5. Step 5: Solve for x
    x = 1,539,739.21/1,979.43
  6. Step 6: Final answer
    x = 777.87

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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.