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Finding the Fourth Proportional to 682.30, 941.68 and 387.60

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Solution

The fourth proportional to 682.30, 941.68 and 387.60 is: 534.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.30 : 941.68 = 387.60 : x
  2. Step 2: Convert to fraction form
    682.30/941.68 = 387.60/x
  3. Step 3: Cross multiply
    682.30x = 941.68 × 387.60
  4. Step 4: Simplify right side
    682.30x = 364,995.17
  5. Step 5: Solve for x
    x = 364,995.17/682.30
  6. Step 6: Final answer
    x = 534.95

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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.