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Finding the Fourth Proportional to 170.82, 256.12 and 145.03

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Solution

The fourth proportional to 170.82, 256.12 and 145.03 is: 217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.82 : 256.12 = 145.03 : x
  2. Step 2: Convert to fraction form
    170.82/256.12 = 145.03/x
  3. Step 3: Cross multiply
    170.82x = 256.12 × 145.03
  4. Step 4: Simplify right side
    170.82x = 37,145.08
  5. Step 5: Solve for x
    x = 37,145.08/170.82
  6. Step 6: Final answer
    x = 217.45

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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.