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Finding the Fourth Proportional to 792.21, 1,093.26 and 438.12

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Solution

The fourth proportional to 792.21, 1,093.26 and 438.12 is: 604.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.21 : 1,093.26 = 438.12 : x
  2. Step 2: Convert to fraction form
    792.21/1,093.26 = 438.12/x
  3. Step 3: Cross multiply
    792.21x = 1,093.26 × 438.12
  4. Step 4: Simplify right side
    792.21x = 478,975.38
  5. Step 5: Solve for x
    x = 478,975.38/792.21
  6. Step 6: Final answer
    x = 604.60

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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.