Home / 825,890,981.25-1,139,759,628.11-449,529,391.28

Finding the Fourth Proportional to 825,890,981.25, 1,139,759,628.11 and 449,529,391.28

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Solution

The fourth proportional to 825,890,981.25, 1,139,759,628.11 and 449,529,391.28 is: 620,366,929.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    825,890,981.25 : 1,139,759,628.11 = 449,529,391.28 : x
  2. Step 2: Convert to fraction form
    825,890,981.25/1,139,759,628.11 = 449,529,391.28/x
  3. Step 3: Cross multiply
    825,890,981.25x = 1,139,759,628.11 × 449,529,391.28
  4. Step 4: Simplify right side
    825,890,981.25x = 512,355,451,821,860,992
  5. Step 5: Solve for x
    x = 512,355,451,821,860,992/825,890,981.25
  6. Step 6: Final answer
    x = 620,366,929.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.