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Finding the Fourth Proportional to 199.15, 274.99 and 133.69

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Solution

The fourth proportional to 199.15, 274.99 and 133.69 is: 184.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.15 : 274.99 = 133.69 : x
  2. Step 2: Convert to fraction form
    199.15/274.99 = 133.69/x
  3. Step 3: Cross multiply
    199.15x = 274.99 × 133.69
  4. Step 4: Simplify right side
    199.15x = 36,763.41
  5. Step 5: Solve for x
    x = 36,763.41/199.15
  6. Step 6: Final answer
    x = 184.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.