Home / 690,494,409.78-1,036,396,427.57-427,383,074.90

Finding the Fourth Proportional to 690,494,409.78, 1,036,396,427.57 and 427,383,074.90

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Solution

The fourth proportional to 690,494,409.78, 1,036,396,427.57 and 427,383,074.90 is: 641,479,910.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,494,409.78 : 1,036,396,427.57 = 427,383,074.90 : x
  2. Step 2: Convert to fraction form
    690,494,409.78/1,036,396,427.57 = 427,383,074.90/x
  3. Step 3: Cross multiply
    690,494,409.78x = 1,036,396,427.57 × 427,383,074.90
  4. Step 4: Simplify right side
    690,494,409.78x = 442,938,292,030,241,728
  5. Step 5: Solve for x
    x = 442,938,292,030,241,728/690,494,409.78
  6. Step 6: Final answer
    x = 641,479,910.27

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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.