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Finding the Fourth Proportional to 683.17, 942.81 and 388.49

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Solution

The fourth proportional to 683.17, 942.81 and 388.49 is: 536.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.17 : 942.81 = 388.49 : x
  2. Step 2: Convert to fraction form
    683.17/942.81 = 388.49/x
  3. Step 3: Cross multiply
    683.17x = 942.81 × 388.49
  4. Step 4: Simplify right side
    683.17x = 366,267.54
  5. Step 5: Solve for x
    x = 366,267.54/683.17
  6. Step 6: Final answer
    x = 536.13

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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.