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Finding the Fourth Proportional to 381.95, 571.70 and 300.95

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Solution

The fourth proportional to 381.95, 571.70 and 300.95 is: 450.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.95 : 571.70 = 300.95 : x
  2. Step 2: Convert to fraction form
    381.95/571.70 = 300.95/x
  3. Step 3: Cross multiply
    381.95x = 571.70 × 300.95
  4. Step 4: Simplify right side
    381.95x = 172,053.12
  5. Step 5: Solve for x
    x = 172,053.12/381.95
  6. Step 6: Final answer
    x = 450.46

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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.