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Finding the Fourth Proportional to 662.30, 939.17 and 662.30

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Solution

The fourth proportional to 662.30, 939.17 and 662.30 is: 939.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.30 : 939.17 = 662.30 : x
  2. Step 2: Convert to fraction form
    662.30/939.17 = 662.30/x
  3. Step 3: Cross multiply
    662.30x = 939.17 × 662.30
  4. Step 4: Simplify right side
    662.30x = 622,012.29
  5. Step 5: Solve for x
    x = 622,012.29/662.30
  6. Step 6: Final answer
    x = 939.17

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.