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Finding the Fourth Proportional to 615.59, 849.28 and 394.51

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Solution

The fourth proportional to 615.59, 849.28 and 394.51 is: 544.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.59 : 849.28 = 394.51 : x
  2. Step 2: Convert to fraction form
    615.59/849.28 = 394.51/x
  3. Step 3: Cross multiply
    615.59x = 849.28 × 394.51
  4. Step 4: Simplify right side
    615.59x = 335,049.45
  5. Step 5: Solve for x
    x = 335,049.45/615.59
  6. Step 6: Final answer
    x = 544.27

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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.