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Finding the Fourth Proportional to 615.66, 849.28 and 394.37

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Solution

The fourth proportional to 615.66, 849.28 and 394.37 is: 544.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.66 : 849.28 = 394.37 : x
  2. Step 2: Convert to fraction form
    615.66/849.28 = 394.37/x
  3. Step 3: Cross multiply
    615.66x = 849.28 × 394.37
  4. Step 4: Simplify right side
    615.66x = 334,933.17
  5. Step 5: Solve for x
    x = 334,933.17/615.66
  6. Step 6: Final answer
    x = 544.02

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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.