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Finding the Fourth Proportional to 682.17, 941.37 and 387.45

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Solution

The fourth proportional to 682.17, 941.37 and 387.45 is: 534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.17 : 941.37 = 387.45 : x
  2. Step 2: Convert to fraction form
    682.17/941.37 = 387.45/x
  3. Step 3: Cross multiply
    682.17x = 941.37 × 387.45
  4. Step 4: Simplify right side
    682.17x = 364,735.88
  5. Step 5: Solve for x
    x = 364,735.88/682.17
  6. Step 6: Final answer
    x = 534.67

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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.