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Finding the Fourth Proportional to 682.34, 941.65 and 387.65

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Solution

The fourth proportional to 682.34, 941.65 and 387.65 is: 534.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.34 : 941.65 = 387.65 : x
  2. Step 2: Convert to fraction form
    682.34/941.65 = 387.65/x
  3. Step 3: Cross multiply
    682.34x = 941.65 × 387.65
  4. Step 4: Simplify right side
    682.34x = 365,032.01
  5. Step 5: Solve for x
    x = 365,032.01/682.34
  6. Step 6: Final answer
    x = 534.97

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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.