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Finding the Fourth Proportional to 170.79, 255.30 and 127.05

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Solution

The fourth proportional to 170.79, 255.30 and 127.05 is: 189.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.79 : 255.30 = 127.05 : x
  2. Step 2: Convert to fraction form
    170.79/255.30 = 127.05/x
  3. Step 3: Cross multiply
    170.79x = 255.30 × 127.05
  4. Step 4: Simplify right side
    170.79x = 32,435.23
  5. Step 5: Solve for x
    x = 32,435.23/170.79
  6. Step 6: Final answer
    x = 189.91

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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.