Home / 1,181.25-1,773.90-1,119.69

Finding the Fourth Proportional to 1,181.25, 1,773.90 and 1,119.69

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Solution

The fourth proportional to 1,181.25, 1,773.90 and 1,119.69 is: 1,681.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.25 : 1,773.90 = 1,119.69 : x
  2. Step 2: Convert to fraction form
    1,181.25/1,773.90 = 1,119.69/x
  3. Step 3: Cross multiply
    1,181.25x = 1,773.90 × 1,119.69
  4. Step 4: Simplify right side
    1,181.25x = 1,986,218.09
  5. Step 5: Solve for x
    x = 1,986,218.09/1,181.25
  6. Step 6: Final answer
    x = 1,681.45

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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.