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Finding the Fourth Proportional to 381.43, 572.09 and 164.98

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Solution

The fourth proportional to 381.43, 572.09 and 164.98 is: 247.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.43 : 572.09 = 164.98 : x
  2. Step 2: Convert to fraction form
    381.43/572.09 = 164.98/x
  3. Step 3: Cross multiply
    381.43x = 572.09 × 164.98
  4. Step 4: Simplify right side
    381.43x = 94,383.41
  5. Step 5: Solve for x
    x = 94,383.41/381.43
  6. Step 6: Final answer
    x = 247.45

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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.