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Finding the Fourth Proportional to 520.21, 779.94 and 246.15

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Solution

The fourth proportional to 520.21, 779.94 and 246.15 is: 369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.21 : 779.94 = 246.15 : x
  2. Step 2: Convert to fraction form
    520.21/779.94 = 246.15/x
  3. Step 3: Cross multiply
    520.21x = 779.94 × 246.15
  4. Step 4: Simplify right side
    520.21x = 191,982.23
  5. Step 5: Solve for x
    x = 191,982.23/520.21
  6. Step 6: Final answer
    x = 369.05

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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.