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Finding the Fourth Proportional to 577.19, 865.77 and 211.88

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Solution

The fourth proportional to 577.19, 865.77 and 211.88 is: 317.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.19 : 865.77 = 211.88 : x
  2. Step 2: Convert to fraction form
    577.19/865.77 = 211.88/x
  3. Step 3: Cross multiply
    577.19x = 865.77 × 211.88
  4. Step 4: Simplify right side
    577.19x = 183,439.35
  5. Step 5: Solve for x
    x = 183,439.35/577.19
  6. Step 6: Final answer
    x = 317.81

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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.