Home / 1,778.82-2,668.02-1,120.80

Finding the Fourth Proportional to 1,778.82, 2,668.02 and 1,120.80

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Solution

The fourth proportional to 1,778.82, 2,668.02 and 1,120.80 is: 1,681.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.82 : 2,668.02 = 1,120.80 : x
  2. Step 2: Convert to fraction form
    1,778.82/2,668.02 = 1,120.80/x
  3. Step 3: Cross multiply
    1,778.82x = 2,668.02 × 1,120.80
  4. Step 4: Simplify right side
    1,778.82x = 2,990,316.82
  5. Step 5: Solve for x
    x = 2,990,316.82/1,778.82
  6. Step 6: Final answer
    x = 1,681.07

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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.