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Finding the Fourth Proportional to 392.60, 589.26 and 284.96

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Solution

The fourth proportional to 392.60, 589.26 and 284.96 is: 427.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.60 : 589.26 = 284.96 : x
  2. Step 2: Convert to fraction form
    392.60/589.26 = 284.96/x
  3. Step 3: Cross multiply
    392.60x = 589.26 × 284.96
  4. Step 4: Simplify right side
    392.60x = 167,915.53
  5. Step 5: Solve for x
    x = 167,915.53/392.60
  6. Step 6: Final answer
    x = 427.70

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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.