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Finding the Fourth Proportional to 392.72, 589.90 and 301.10

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Solution

The fourth proportional to 392.72, 589.90 and 301.10 is: 452.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.72 : 589.90 = 301.10 : x
  2. Step 2: Convert to fraction form
    392.72/589.90 = 301.10/x
  3. Step 3: Cross multiply
    392.72x = 589.90 × 301.10
  4. Step 4: Simplify right side
    392.72x = 177,618.89
  5. Step 5: Solve for x
    x = 177,618.89/392.72
  6. Step 6: Final answer
    x = 452.28

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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.