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Finding the Fourth Proportional to 682.51, 941.86 and 387.83

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Solution

The fourth proportional to 682.51, 941.86 and 387.83 is: 535.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.51 : 941.86 = 387.83 : x
  2. Step 2: Convert to fraction form
    682.51/941.86 = 387.83/x
  3. Step 3: Cross multiply
    682.51x = 941.86 × 387.83
  4. Step 4: Simplify right side
    682.51x = 365,281.56
  5. Step 5: Solve for x
    x = 365,281.56/682.51
  6. Step 6: Final answer
    x = 535.20

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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.