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Finding the Fourth Proportional to 519.77, 779.45 and 231

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Solution

The fourth proportional to 519.77, 779.45 and 231 is: 346.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.77 : 779.45 = 231 : x
  2. Step 2: Convert to fraction form
    519.77/779.45 = 231/x
  3. Step 3: Cross multiply
    519.77x = 779.45 × 231
  4. Step 4: Simplify right side
    519.77x = 180,051.80
  5. Step 5: Solve for x
    x = 180,051.80/519.77
  6. Step 6: Final answer
    x = 346.41

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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.