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Finding the Fourth Proportional to 382.46, 571.34 and 305.56

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Solution

The fourth proportional to 382.46, 571.34 and 305.56 is: 456.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.46 : 571.34 = 305.56 : x
  2. Step 2: Convert to fraction form
    382.46/571.34 = 305.56/x
  3. Step 3: Cross multiply
    382.46x = 571.34 × 305.56
  4. Step 4: Simplify right side
    382.46x = 174,580.13
  5. Step 5: Solve for x
    x = 174,580.13/382.46
  6. Step 6: Final answer
    x = 456.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.