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Finding the Fourth Proportional to 381.71, 525.79 and 294.23

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Solution

The fourth proportional to 381.71, 525.79 and 294.23 is: 405.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.71 : 525.79 = 294.23 : x
  2. Step 2: Convert to fraction form
    381.71/525.79 = 294.23/x
  3. Step 3: Cross multiply
    381.71x = 525.79 × 294.23
  4. Step 4: Simplify right side
    381.71x = 154,704.87
  5. Step 5: Solve for x
    x = 154,704.87/381.71
  6. Step 6: Final answer
    x = 405.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.