Home / 786,084,355.82-1,178,505,245.99-392,409,138.40

Finding the Fourth Proportional to 786,084,355.82, 1,178,505,245.99 and 392,409,138.40

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Solution

The fourth proportional to 786,084,355.82, 1,178,505,245.99 and 392,409,138.40 is: 588,303,564.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,084,355.82 : 1,178,505,245.99 = 392,409,138.40 : x
  2. Step 2: Convert to fraction form
    786,084,355.82/1,178,505,245.99 = 392,409,138.40/x
  3. Step 3: Cross multiply
    786,084,355.82x = 1,178,505,245.99 × 392,409,138.40
  4. Step 4: Simplify right side
    786,084,355.82x = 462,456,228,170,961,344
  5. Step 5: Solve for x
    x = 462,456,228,170,961,344/786,084,355.82
  6. Step 6: Final answer
    x = 588,303,564.05

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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.