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Finding the Fourth Proportional to 1,194.81, 1,778.80 and 1,189.02

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Solution

The fourth proportional to 1,194.81, 1,778.80 and 1,189.02 is: 1,770.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.81 : 1,778.80 = 1,189.02 : x
  2. Step 2: Convert to fraction form
    1,194.81/1,778.80 = 1,189.02/x
  3. Step 3: Cross multiply
    1,194.81x = 1,778.80 × 1,189.02
  4. Step 4: Simplify right side
    1,194.81x = 2,115,034.70
  5. Step 5: Solve for x
    x = 2,115,034.70/1,194.81
  6. Step 6: Final answer
    x = 1,770.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.