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Finding the Fourth Proportional to 578.09, 797.78 and 316.12

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Solution

The fourth proportional to 578.09, 797.78 and 316.12 is: 436.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.09 : 797.78 = 316.12 : x
  2. Step 2: Convert to fraction form
    578.09/797.78 = 316.12/x
  3. Step 3: Cross multiply
    578.09x = 797.78 × 316.12
  4. Step 4: Simplify right side
    578.09x = 252,194.21
  5. Step 5: Solve for x
    x = 252,194.21/578.09
  6. Step 6: Final answer
    x = 436.25

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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.