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Finding the Fourth Proportional to 394.58, 543.42 and 365.38

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Solution

The fourth proportional to 394.58, 543.42 and 365.38 is: 503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.58 : 543.42 = 365.38 : x
  2. Step 2: Convert to fraction form
    394.58/543.42 = 365.38/x
  3. Step 3: Cross multiply
    394.58x = 543.42 × 365.38
  4. Step 4: Simplify right side
    394.58x = 198,554.80
  5. Step 5: Solve for x
    x = 198,554.80/394.58
  6. Step 6: Final answer
    x = 503.21

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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.