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Finding the Fourth Proportional to 577.97, 867.20 and 212.86

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Solution

The fourth proportional to 577.97, 867.20 and 212.86 is: 319.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.97 : 867.20 = 212.86 : x
  2. Step 2: Convert to fraction form
    577.97/867.20 = 212.86/x
  3. Step 3: Cross multiply
    577.97x = 867.20 × 212.86
  4. Step 4: Simplify right side
    577.97x = 184,592.19
  5. Step 5: Solve for x
    x = 184,592.19/577.97
  6. Step 6: Final answer
    x = 319.38

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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.