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Finding the Fourth Proportional to 615.94, 849.42 and 394.96

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Solution

The fourth proportional to 615.94, 849.42 and 394.96 is: 544.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.94 : 849.42 = 394.96 : x
  2. Step 2: Convert to fraction form
    615.94/849.42 = 394.96/x
  3. Step 3: Cross multiply
    615.94x = 849.42 × 394.96
  4. Step 4: Simplify right side
    615.94x = 335,486.92
  5. Step 5: Solve for x
    x = 335,486.92/615.94
  6. Step 6: Final answer
    x = 544.67

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Why These Related Problems?

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