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Finding the Fourth Proportional to 671.68, 927.04 and 438.80

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Solution

The fourth proportional to 671.68, 927.04 and 438.80 is: 605.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.68 : 927.04 = 438.80 : x
  2. Step 2: Convert to fraction form
    671.68/927.04 = 438.80/x
  3. Step 3: Cross multiply
    671.68x = 927.04 × 438.80
  4. Step 4: Simplify right side
    671.68x = 406,785.15
  5. Step 5: Solve for x
    x = 406,785.15/671.68
  6. Step 6: Final answer
    x = 605.62

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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.