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Finding the Fourth Proportional to 521.09, 781.33 and 196.48

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Solution

The fourth proportional to 521.09, 781.33 and 196.48 is: 294.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.09 : 781.33 = 196.48 : x
  2. Step 2: Convert to fraction form
    521.09/781.33 = 196.48/x
  3. Step 3: Cross multiply
    521.09x = 781.33 × 196.48
  4. Step 4: Simplify right side
    521.09x = 153,515.72
  5. Step 5: Solve for x
    x = 153,515.72/521.09
  6. Step 6: Final answer
    x = 294.60

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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.