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Finding the Fourth Proportional to 615.54, 849.30 and 394.50

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Solution

The fourth proportional to 615.54, 849.30 and 394.50 is: 544.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.54 : 849.30 = 394.50 : x
  2. Step 2: Convert to fraction form
    615.54/849.30 = 394.50/x
  3. Step 3: Cross multiply
    615.54x = 849.30 × 394.50
  4. Step 4: Simplify right side
    615.54x = 335,048.85
  5. Step 5: Solve for x
    x = 335,048.85/615.54
  6. Step 6: Final answer
    x = 544.32

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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.