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Finding the Fourth Proportional to 382.70, 573.66 and 305.79

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Solution

The fourth proportional to 382.70, 573.66 and 305.79 is: 458.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.70 : 573.66 = 305.79 : x
  2. Step 2: Convert to fraction form
    382.70/573.66 = 305.79/x
  3. Step 3: Cross multiply
    382.70x = 573.66 × 305.79
  4. Step 4: Simplify right side
    382.70x = 175,419.49
  5. Step 5: Solve for x
    x = 175,419.49/382.70
  6. Step 6: Final answer
    x = 458.38

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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.