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Finding the Fourth Proportional to 892.38, 1,230.30 and 682.68

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Solution

The fourth proportional to 892.38, 1,230.30 and 682.68 is: 941.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.38 : 1,230.30 = 682.68 : x
  2. Step 2: Convert to fraction form
    892.38/1,230.30 = 682.68/x
  3. Step 3: Cross multiply
    892.38x = 1,230.30 × 682.68
  4. Step 4: Simplify right side
    892.38x = 839,901.20
  5. Step 5: Solve for x
    x = 839,901.20/892.38
  6. Step 6: Final answer
    x = 941.19

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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.