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Finding the Fourth Proportional to 381.30, 571.65 and 164.82

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Solution

The fourth proportional to 381.30, 571.65 and 164.82 is: 247.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.30 : 571.65 = 164.82 : x
  2. Step 2: Convert to fraction form
    381.30/571.65 = 164.82/x
  3. Step 3: Cross multiply
    381.30x = 571.65 × 164.82
  4. Step 4: Simplify right side
    381.30x = 94,219.35
  5. Step 5: Solve for x
    x = 94,219.35/381.30
  6. Step 6: Final answer
    x = 247.10

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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.