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Finding the Fourth Proportional to 490.23, 734.74 and 284.38

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Solution

The fourth proportional to 490.23, 734.74 and 284.38 is: 426.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.23 : 734.74 = 284.38 : x
  2. Step 2: Convert to fraction form
    490.23/734.74 = 284.38/x
  3. Step 3: Cross multiply
    490.23x = 734.74 × 284.38
  4. Step 4: Simplify right side
    490.23x = 208,942.81
  5. Step 5: Solve for x
    x = 208,942.81/490.23
  6. Step 6: Final answer
    x = 426.21

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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.