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Finding the Fourth Proportional to 896.16, 1,236.81 and 503.31

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Solution

The fourth proportional to 896.16, 1,236.81 and 503.31 is: 694.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.16 : 1,236.81 = 503.31 : x
  2. Step 2: Convert to fraction form
    896.16/1,236.81 = 503.31/x
  3. Step 3: Cross multiply
    896.16x = 1,236.81 × 503.31
  4. Step 4: Simplify right side
    896.16x = 622,498.84
  5. Step 5: Solve for x
    x = 622,498.84/896.16
  6. Step 6: Final answer
    x = 694.63

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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.