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Finding the Fourth Proportional to 578.22, 797.65 and 381.39

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Solution

The fourth proportional to 578.22, 797.65 and 381.39 is: 526.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.22 : 797.65 = 381.39 : x
  2. Step 2: Convert to fraction form
    578.22/797.65 = 381.39/x
  3. Step 3: Cross multiply
    578.22x = 797.65 × 381.39
  4. Step 4: Simplify right side
    578.22x = 304,215.73
  5. Step 5: Solve for x
    x = 304,215.73/578.22
  6. Step 6: Final answer
    x = 526.12

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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.