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Finding the Fourth Proportional to 577.75, 866.22 and 212.49

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Solution

The fourth proportional to 577.75, 866.22 and 212.49 is: 318.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.75 : 866.22 = 212.49 : x
  2. Step 2: Convert to fraction form
    577.75/866.22 = 212.49/x
  3. Step 3: Cross multiply
    577.75x = 866.22 × 212.49
  4. Step 4: Simplify right side
    577.75x = 184,063.09
  5. Step 5: Solve for x
    x = 184,063.09/577.75
  6. Step 6: Final answer
    x = 318.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.