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Finding the Fourth Proportional to 1,196.13, 1,791.80 and 611.11

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Solution

The fourth proportional to 1,196.13, 1,791.80 and 611.11 is: 915.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,196.13 : 1,791.80 = 611.11 : x
  2. Step 2: Convert to fraction form
    1,196.13/1,791.80 = 611.11/x
  3. Step 3: Cross multiply
    1,196.13x = 1,791.80 × 611.11
  4. Step 4: Simplify right side
    1,196.13x = 1,094,986.90
  5. Step 5: Solve for x
    x = 1,094,986.90/1,196.13
  6. Step 6: Final answer
    x = 915.44

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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.