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Finding the Fourth Proportional to 577.11, 864.88 and 211.55

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Solution

The fourth proportional to 577.11, 864.88 and 211.55 is: 317.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.11 : 864.88 = 211.55 : x
  2. Step 2: Convert to fraction form
    577.11/864.88 = 211.55/x
  3. Step 3: Cross multiply
    577.11x = 864.88 × 211.55
  4. Step 4: Simplify right side
    577.11x = 182,965.36
  5. Step 5: Solve for x
    x = 182,965.36/577.11
  6. Step 6: Final answer
    x = 317.04

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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.