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Finding the Fourth Proportional to 896.30, 1,236.90 and 503.30

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Solution

The fourth proportional to 896.30, 1,236.90 and 503.30 is: 694.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.30 : 1,236.90 = 503.30 : x
  2. Step 2: Convert to fraction form
    896.30/1,236.90 = 503.30/x
  3. Step 3: Cross multiply
    896.30x = 1,236.90 × 503.30
  4. Step 4: Simplify right side
    896.30x = 622,531.77
  5. Step 5: Solve for x
    x = 622,531.77/896.30
  6. Step 6: Final answer
    x = 694.56

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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.