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Finding the Fourth Proportional to 3,100.92, 4,651.07 and 909.60

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Solution

The fourth proportional to 3,100.92, 4,651.07 and 909.60 is: 1,364.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.92 : 4,651.07 = 909.60 : x
  2. Step 2: Convert to fraction form
    3,100.92/4,651.07 = 909.60/x
  3. Step 3: Cross multiply
    3,100.92x = 4,651.07 × 909.60
  4. Step 4: Simplify right side
    3,100.92x = 4,230,608.72
  5. Step 5: Solve for x
    x = 4,230,608.72/3,100.92
  6. Step 6: Final answer
    x = 1,364.31

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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.