Home / 811,136,108.80-1,216,704,163.20-782,470,662.40

Finding the Fourth Proportional to 811,136,108.80, 1,216,704,163.20 and 782,470,662.40

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Solution

The fourth proportional to 811,136,108.80, 1,216,704,163.20 and 782,470,662.40 is: 1,173,705,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,136,108.80 : 1,216,704,163.20 = 782,470,662.40 : x
  2. Step 2: Convert to fraction form
    811,136,108.80/1,216,704,163.20 = 782,470,662.40/x
  3. Step 3: Cross multiply
    811,136,108.80x = 1,216,704,163.20 × 782,470,662.40
  4. Step 4: Simplify right side
    811,136,108.80x = 952,035,312,523,941,760
  5. Step 5: Solve for x
    x = 952,035,312,523,941,760/811,136,108.80
  6. Step 6: Final answer
    x = 1,173,705,993.60

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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.