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Finding the Fourth Proportional to 644.25, 888.24 and 423.27

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Solution

The fourth proportional to 644.25, 888.24 and 423.27 is: 583.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.25 : 888.24 = 423.27 : x
  2. Step 2: Convert to fraction form
    644.25/888.24 = 423.27/x
  3. Step 3: Cross multiply
    644.25x = 888.24 × 423.27
  4. Step 4: Simplify right side
    644.25x = 375,965.34
  5. Step 5: Solve for x
    x = 375,965.34/644.25
  6. Step 6: Final answer
    x = 583.57

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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.