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Finding the Fourth Proportional to 693.54, 956.91 and 394.79

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Solution

The fourth proportional to 693.54, 956.91 and 394.79 is: 544.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.54 : 956.91 = 394.79 : x
  2. Step 2: Convert to fraction form
    693.54/956.91 = 394.79/x
  3. Step 3: Cross multiply
    693.54x = 956.91 × 394.79
  4. Step 4: Simplify right side
    693.54x = 377,780.10
  5. Step 5: Solve for x
    x = 377,780.10/693.54
  6. Step 6: Final answer
    x = 544.71

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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.