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Finding the Fourth Proportional to 489,392,136.80, 734,088,205.20 and 343,989,879.20

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Solution

The fourth proportional to 489,392,136.80, 734,088,205.20 and 343,989,879.20 is: 515,984,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,392,136.80 : 734,088,205.20 = 343,989,879.20 : x
  2. Step 2: Convert to fraction form
    489,392,136.80/734,088,205.20 = 343,989,879.20/x
  3. Step 3: Cross multiply
    489,392,136.80x = 734,088,205.20 × 343,989,879.20
  4. Step 4: Simplify right side
    489,392,136.80x = 252,518,913,028,892,832
  5. Step 5: Solve for x
    x = 252,518,913,028,892,832/489,392,136.80
  6. Step 6: Final answer
    x = 515,984,818.80

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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.