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Finding the Fourth Proportional to 637.03, 879.81 and 438.39

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Solution

The fourth proportional to 637.03, 879.81 and 438.39 is: 605.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.03 : 879.81 = 438.39 : x
  2. Step 2: Convert to fraction form
    637.03/879.81 = 438.39/x
  3. Step 3: Cross multiply
    637.03x = 879.81 × 438.39
  4. Step 4: Simplify right side
    637.03x = 385,698.26
  5. Step 5: Solve for x
    x = 385,698.26/637.03
  6. Step 6: Final answer
    x = 605.46

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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.