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Finding the Fourth Proportional to 826.03, 1,236.22 and 644.25

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Solution

The fourth proportional to 826.03, 1,236.22 and 644.25 is: 964.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.03 : 1,236.22 = 644.25 : x
  2. Step 2: Convert to fraction form
    826.03/1,236.22 = 644.25/x
  3. Step 3: Cross multiply
    826.03x = 1,236.22 × 644.25
  4. Step 4: Simplify right side
    826.03x = 796,434.74
  5. Step 5: Solve for x
    x = 796,434.74/826.03
  6. Step 6: Final answer
    x = 964.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.