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Finding the Fourth Proportional to 682.25, 941.67 and 387.68

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Solution

The fourth proportional to 682.25, 941.67 and 387.68 is: 535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.25 : 941.67 = 387.68 : x
  2. Step 2: Convert to fraction form
    682.25/941.67 = 387.68/x
  3. Step 3: Cross multiply
    682.25x = 941.67 × 387.68
  4. Step 4: Simplify right side
    682.25x = 365,066.63
  5. Step 5: Solve for x
    x = 365,066.63/682.25
  6. Step 6: Final answer
    x = 535.09

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1.5x scale

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.