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Finding the Fourth Proportional to 577.38, 866.09 and 212.43

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Solution

The fourth proportional to 577.38, 866.09 and 212.43 is: 318.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.38 : 866.09 = 212.43 : x
  2. Step 2: Convert to fraction form
    577.38/866.09 = 212.43/x
  3. Step 3: Cross multiply
    577.38x = 866.09 × 212.43
  4. Step 4: Simplify right side
    577.38x = 183,983.50
  5. Step 5: Solve for x
    x = 183,983.50/577.38
  6. Step 6: Final answer
    x = 318.65

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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.