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Finding the Fourth Proportional to 683.14, 1,024.96 and 394.50

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Solution

The fourth proportional to 683.14, 1,024.96 and 394.50 is: 591.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.14 : 1,024.96 = 394.50 : x
  2. Step 2: Convert to fraction form
    683.14/1,024.96 = 394.50/x
  3. Step 3: Cross multiply
    683.14x = 1,024.96 × 394.50
  4. Step 4: Simplify right side
    683.14x = 404,346.72
  5. Step 5: Solve for x
    x = 404,346.72/683.14
  6. Step 6: Final answer
    x = 591.89

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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.