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Finding the Fourth Proportional to 578.21, 797.98 and 316.26

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Solution

The fourth proportional to 578.21, 797.98 and 316.26 is: 436.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.21 : 797.98 = 316.26 : x
  2. Step 2: Convert to fraction form
    578.21/797.98 = 316.26/x
  3. Step 3: Cross multiply
    578.21x = 797.98 × 316.26
  4. Step 4: Simplify right side
    578.21x = 252,371.94
  5. Step 5: Solve for x
    x = 252,371.94/578.21
  6. Step 6: Final answer
    x = 436.47

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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.