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Finding the Fourth Proportional to 792.63, 1,093.82 and 438.57

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Solution

The fourth proportional to 792.63, 1,093.82 and 438.57 is: 605.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.63 : 1,093.82 = 438.57 : x
  2. Step 2: Convert to fraction form
    792.63/1,093.82 = 438.57/x
  3. Step 3: Cross multiply
    792.63x = 1,093.82 × 438.57
  4. Step 4: Simplify right side
    792.63x = 479,714.44
  5. Step 5: Solve for x
    x = 479,714.44/792.63
  6. Step 6: Final answer
    x = 605.22

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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.