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Finding the Fourth Proportional to 896.82, 1,238.01 and 660.81

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Solution

The fourth proportional to 896.82, 1,238.01 and 660.81 is: 912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.82 : 1,238.01 = 660.81 : x
  2. Step 2: Convert to fraction form
    896.82/1,238.01 = 660.81/x
  3. Step 3: Cross multiply
    896.82x = 1,238.01 × 660.81
  4. Step 4: Simplify right side
    896.82x = 818,086.45
  5. Step 5: Solve for x
    x = 818,086.45/896.82
  6. Step 6: Final answer
    x = 912.21

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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.