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Finding the Fourth Proportional to 615.89, 849.74 and 394.46

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Solution

The fourth proportional to 615.89, 849.74 and 394.46 is: 544.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.89 : 849.74 = 394.46 : x
  2. Step 2: Convert to fraction form
    615.89/849.74 = 394.46/x
  3. Step 3: Cross multiply
    615.89x = 849.74 × 394.46
  4. Step 4: Simplify right side
    615.89x = 335,185.18
  5. Step 5: Solve for x
    x = 335,185.18/615.89
  6. Step 6: Final answer
    x = 544.23

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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.