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Finding the Fourth Proportional to 392.29, 589.25 and 270.79

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Solution

The fourth proportional to 392.29, 589.25 and 270.79 is: 406.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.29 : 589.25 = 270.79 : x
  2. Step 2: Convert to fraction form
    392.29/589.25 = 270.79/x
  3. Step 3: Cross multiply
    392.29x = 589.25 × 270.79
  4. Step 4: Simplify right side
    392.29x = 159,561.65
  5. Step 5: Solve for x
    x = 159,561.65/392.29
  6. Step 6: Final answer
    x = 406.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.