Home / 1,979.18-2,968.68-1,155.80

Finding the Fourth Proportional to 1,979.18, 2,968.68 and 1,155.80

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Solution

The fourth proportional to 1,979.18, 2,968.68 and 1,155.80 is: 1,733.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.18 : 2,968.68 = 1,155.80 : x
  2. Step 2: Convert to fraction form
    1,979.18/2,968.68 = 1,155.80/x
  3. Step 3: Cross multiply
    1,979.18x = 2,968.68 × 1,155.80
  4. Step 4: Simplify right side
    1,979.18x = 3,431,200.34
  5. Step 5: Solve for x
    x = 3,431,200.34/1,979.18
  6. Step 6: Final answer
    x = 1,733.65

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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.