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Finding the Fourth Proportional to 490.86, 734.67 and 436.86

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Solution

The fourth proportional to 490.86, 734.67 and 436.86 is: 653.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.86 : 734.67 = 436.86 : x
  2. Step 2: Convert to fraction form
    490.86/734.67 = 436.86/x
  3. Step 3: Cross multiply
    490.86x = 734.67 × 436.86
  4. Step 4: Simplify right side
    490.86x = 320,947.94
  5. Step 5: Solve for x
    x = 320,947.94/490.86
  6. Step 6: Final answer
    x = 653.85

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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.