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Finding the Fourth Proportional to 896.36, 1,236.92 and 503.40

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Solution

The fourth proportional to 896.36, 1,236.92 and 503.40 is: 694.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.36 : 1,236.92 = 503.40 : x
  2. Step 2: Convert to fraction form
    896.36/1,236.92 = 503.40/x
  3. Step 3: Cross multiply
    896.36x = 1,236.92 × 503.40
  4. Step 4: Simplify right side
    896.36x = 622,663.01
  5. Step 5: Solve for x
    x = 622,663.01/896.36
  6. Step 6: Final answer
    x = 694.66

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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.