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Finding the Fourth Proportional to 6,976,728.64, 9,628,683.60 and 3,879,560.80

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Solution

The fourth proportional to 6,976,728.64, 9,628,683.60 and 3,879,560.80 is: 5,354,237.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,976,728.64 : 9,628,683.60 = 3,879,560.80 : x
  2. Step 2: Convert to fraction form
    6,976,728.64/9,628,683.60 = 3,879,560.80/x
  3. Step 3: Cross multiply
    6,976,728.64x = 9,628,683.60 × 3,879,560.80
  4. Step 4: Simplify right side
    6,976,728.64x = 37,355,063,450,162.88
  5. Step 5: Solve for x
    x = 37,355,063,450,162.88/6,976,728.64
  6. Step 6: Final answer
    x = 5,354,237.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.