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Finding the Fourth Proportional to 683.21, 1,024.82 and 170.21

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Solution

The fourth proportional to 683.21, 1,024.82 and 170.21 is: 255.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.21 : 1,024.82 = 170.21 : x
  2. Step 2: Convert to fraction form
    683.21/1,024.82 = 170.21/x
  3. Step 3: Cross multiply
    683.21x = 1,024.82 × 170.21
  4. Step 4: Simplify right side
    683.21x = 174,428.64
  5. Step 5: Solve for x
    x = 174,428.64/683.21
  6. Step 6: Final answer
    x = 255.31

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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.