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Finding the Fourth Proportional to 280,114,879.20, 419,416,491.60 and 280,114,879.20

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Solution

The fourth proportional to 280,114,879.20, 419,416,491.60 and 280,114,879.20 is: 419,416,491.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,114,879.20 : 419,416,491.60 = 280,114,879.20 : x
  2. Step 2: Convert to fraction form
    280,114,879.20/419,416,491.60 = 280,114,879.20/x
  3. Step 3: Cross multiply
    280,114,879.20x = 419,416,491.60 × 280,114,879.20
  4. Step 4: Simplify right side
    280,114,879.20x = 117,484,799,879,021,824
  5. Step 5: Solve for x
    x = 117,484,799,879,021,824/280,114,879.20
  6. Step 6: Final answer
    x = 419,416,491.60

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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.