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Finding the Fourth Proportional to 394.99, 543.39 and 357.73

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Solution

The fourth proportional to 394.99, 543.39 and 357.73 is: 492.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.99 : 543.39 = 357.73 : x
  2. Step 2: Convert to fraction form
    394.99/543.39 = 357.73/x
  3. Step 3: Cross multiply
    394.99x = 543.39 × 357.73
  4. Step 4: Simplify right side
    394.99x = 194,386.90
  5. Step 5: Solve for x
    x = 194,386.90/394.99
  6. Step 6: Final answer
    x = 492.13

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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.