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Finding the Fourth Proportional to 577.67, 866.58 and 212.72

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Solution

The fourth proportional to 577.67, 866.58 and 212.72 is: 319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.67 : 866.58 = 212.72 : x
  2. Step 2: Convert to fraction form
    577.67/866.58 = 212.72/x
  3. Step 3: Cross multiply
    577.67x = 866.58 × 212.72
  4. Step 4: Simplify right side
    577.67x = 184,334.56
  5. Step 5: Solve for x
    x = 184,334.56/577.67
  6. Step 6: Final answer
    x = 319.10

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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.