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Finding the Fourth Proportional to 576.75, 796.22 and 390.49

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Solution

The fourth proportional to 576.75, 796.22 and 390.49 is: 539.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.75 : 796.22 = 390.49 : x
  2. Step 2: Convert to fraction form
    576.75/796.22 = 390.49/x
  3. Step 3: Cross multiply
    576.75x = 796.22 × 390.49
  4. Step 4: Simplify right side
    576.75x = 310,914.00
  5. Step 5: Solve for x
    x = 310,914.00/576.75
  6. Step 6: Final answer
    x = 539.08

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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.