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Finding the Fourth Proportional to 637.23, 879.21 and 438.24

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Solution

The fourth proportional to 637.23, 879.21 and 438.24 is: 604.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.23 : 879.21 = 438.24 : x
  2. Step 2: Convert to fraction form
    637.23/879.21 = 438.24/x
  3. Step 3: Cross multiply
    637.23x = 879.21 × 438.24
  4. Step 4: Simplify right side
    637.23x = 385,304.99
  5. Step 5: Solve for x
    x = 385,304.99/637.23
  6. Step 6: Final answer
    x = 604.66

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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.