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Finding the Fourth Proportional to 615.14, 849.30 and 394.19

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Solution

The fourth proportional to 615.14, 849.30 and 394.19 is: 544.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.14 : 849.30 = 394.19 : x
  2. Step 2: Convert to fraction form
    615.14/849.30 = 394.19/x
  3. Step 3: Cross multiply
    615.14x = 849.30 × 394.19
  4. Step 4: Simplify right side
    615.14x = 334,785.57
  5. Step 5: Solve for x
    x = 334,785.57/615.14
  6. Step 6: Final answer
    x = 544.24

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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.