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Finding the Fourth Proportional to 683.28, 942.90 and 372.78

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Solution

The fourth proportional to 683.28, 942.90 and 372.78 is: 514.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.28 : 942.90 = 372.78 : x
  2. Step 2: Convert to fraction form
    683.28/942.90 = 372.78/x
  3. Step 3: Cross multiply
    683.28x = 942.90 × 372.78
  4. Step 4: Simplify right side
    683.28x = 351,494.26
  5. Step 5: Solve for x
    x = 351,494.26/683.28
  6. Step 6: Final answer
    x = 514.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.