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Finding the Fourth Proportional to 682.47, 941.83 and 387.79

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Solution

The fourth proportional to 682.47, 941.83 and 387.79 is: 535.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.47 : 941.83 = 387.79 : x
  2. Step 2: Convert to fraction form
    682.47/941.83 = 387.79/x
  3. Step 3: Cross multiply
    682.47x = 941.83 × 387.79
  4. Step 4: Simplify right side
    682.47x = 365,228.93
  5. Step 5: Solve for x
    x = 365,228.93/682.47
  6. Step 6: Final answer
    x = 535.16

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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.