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Finding the Fourth Proportional to 577.98, 866.45 and 212.68

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Solution

The fourth proportional to 577.98, 866.45 and 212.68 is: 318.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.98 : 866.45 = 212.68 : x
  2. Step 2: Convert to fraction form
    577.98/866.45 = 212.68/x
  3. Step 3: Cross multiply
    577.98x = 866.45 × 212.68
  4. Step 4: Simplify right side
    577.98x = 184,277.12
  5. Step 5: Solve for x
    x = 184,277.12/577.98
  6. Step 6: Final answer
    x = 318.83

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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.