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Finding the Fourth Proportional to 1,189.45, 1,784.22 and 367.75

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Solution

The fourth proportional to 1,189.45, 1,784.22 and 367.75 is: 551.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.45 : 1,784.22 = 367.75 : x
  2. Step 2: Convert to fraction form
    1,189.45/1,784.22 = 367.75/x
  3. Step 3: Cross multiply
    1,189.45x = 1,784.22 × 367.75
  4. Step 4: Simplify right side
    1,189.45x = 656,146.91
  5. Step 5: Solve for x
    x = 656,146.91/1,189.45
  6. Step 6: Final answer
    x = 551.64

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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.