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Finding the Fourth Proportional to 685.14, 1,028.16 and 682.62

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Solution

The fourth proportional to 685.14, 1,028.16 and 682.62 is: 1,024.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.14 : 1,028.16 = 682.62 : x
  2. Step 2: Convert to fraction form
    685.14/1,028.16 = 682.62/x
  3. Step 3: Cross multiply
    685.14x = 1,028.16 × 682.62
  4. Step 4: Simplify right side
    685.14x = 701,842.58
  5. Step 5: Solve for x
    x = 701,842.58/685.14
  6. Step 6: Final answer
    x = 1,024.38

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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.