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Finding the Fourth Proportional to 521.25, 782.23 and 196.64

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Solution

The fourth proportional to 521.25, 782.23 and 196.64 is: 295.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.25 : 782.23 = 196.64 : x
  2. Step 2: Convert to fraction form
    521.25/782.23 = 196.64/x
  3. Step 3: Cross multiply
    521.25x = 782.23 × 196.64
  4. Step 4: Simplify right side
    521.25x = 153,813.30
  5. Step 5: Solve for x
    x = 153,813.30/521.25
  6. Step 6: Final answer
    x = 295.09

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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.