Home / 426,492,415.20-639,738,622.80-278,539,240.80

Finding the Fourth Proportional to 426,492,415.20, 639,738,622.80 and 278,539,240.80

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Solution

The fourth proportional to 426,492,415.20, 639,738,622.80 and 278,539,240.80 is: 417,808,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,492,415.20 : 639,738,622.80 = 278,539,240.80 : x
  2. Step 2: Convert to fraction form
    426,492,415.20/639,738,622.80 = 278,539,240.80/x
  3. Step 3: Cross multiply
    426,492,415.20x = 639,738,622.80 × 278,539,240.80
  4. Step 4: Simplify right side
    426,492,415.20x = 178,192,310,305,149,568
  5. Step 5: Solve for x
    x = 178,192,310,305,149,568/426,492,415.20
  6. Step 6: Final answer
    x = 417,808,861.20

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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.