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Finding the Fourth Proportional to 6,379,340.72, 8,803,702.80 and 3,478,890.32

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Solution

The fourth proportional to 6,379,340.72, 8,803,702.80 and 3,478,890.32 is: 4,800,984.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379,340.72 : 8,803,702.80 = 3,478,890.32 : x
  2. Step 2: Convert to fraction form
    6,379,340.72/8,803,702.80 = 3,478,890.32/x
  3. Step 3: Cross multiply
    6,379,340.72x = 8,803,702.80 × 3,478,890.32
  4. Step 4: Simplify right side
    6,379,340.72x = 30,627,116,451,076.90
  5. Step 5: Solve for x
    x = 30,627,116,451,076.90/6,379,340.72
  6. Step 6: Final answer
    x = 4,800,984.58

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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.