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Finding the Fourth Proportional to 170.28, 255.75 and 145.89

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Solution

The fourth proportional to 170.28, 255.75 and 145.89 is: 219.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.28 : 255.75 = 145.89 : x
  2. Step 2: Convert to fraction form
    170.28/255.75 = 145.89/x
  3. Step 3: Cross multiply
    170.28x = 255.75 × 145.89
  4. Step 4: Simplify right side
    170.28x = 37,312.87
  5. Step 5: Solve for x
    x = 37,312.87/170.28
  6. Step 6: Final answer
    x = 219.13

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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.