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Finding the Fourth Proportional to 393.89, 544.58 and 376.67

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Solution

The fourth proportional to 393.89, 544.58 and 376.67 is: 520.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.89 : 544.58 = 376.67 : x
  2. Step 2: Convert to fraction form
    393.89/544.58 = 376.67/x
  3. Step 3: Cross multiply
    393.89x = 544.58 × 376.67
  4. Step 4: Simplify right side
    393.89x = 205,122.34
  5. Step 5: Solve for x
    x = 205,122.34/393.89
  6. Step 6: Final answer
    x = 520.77

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.