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Finding the Fourth Proportional to 683.11, 942.65 and 388.34

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Solution

The fourth proportional to 683.11, 942.65 and 388.34 is: 535.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.11 : 942.65 = 388.34 : x
  2. Step 2: Convert to fraction form
    683.11/942.65 = 388.34/x
  3. Step 3: Cross multiply
    683.11x = 942.65 × 388.34
  4. Step 4: Simplify right side
    683.11x = 366,068.70
  5. Step 5: Solve for x
    x = 366,068.70/683.11
  6. Step 6: Final answer
    x = 535.89

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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.