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Finding the Fourth Proportional to 392.28, 587.76 and 262.16

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Solution

The fourth proportional to 392.28, 587.76 and 262.16 is: 392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.28 : 587.76 = 262.16 : x
  2. Step 2: Convert to fraction form
    392.28/587.76 = 262.16/x
  3. Step 3: Cross multiply
    392.28x = 587.76 × 262.16
  4. Step 4: Simplify right side
    392.28x = 154,087.16
  5. Step 5: Solve for x
    x = 154,087.16/392.28
  6. Step 6: Final answer
    x = 392.80

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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.