Home / 427,318,280.80-640,977,421.20-422,783,317.60

Finding the Fourth Proportional to 427,318,280.80, 640,977,421.20 and 422,783,317.60

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Solution

The fourth proportional to 427,318,280.80, 640,977,421.20 and 422,783,317.60 is: 634,174,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,318,280.80 : 640,977,421.20 = 422,783,317.60 : x
  2. Step 2: Convert to fraction form
    427,318,280.80/640,977,421.20 = 422,783,317.60/x
  3. Step 3: Cross multiply
    427,318,280.80x = 640,977,421.20 × 422,783,317.60
  4. Step 4: Simplify right side
    427,318,280.80x = 270,994,560,641,628,608
  5. Step 5: Solve for x
    x = 270,994,560,641,628,608/427,318,280.80
  6. Step 6: Final answer
    x = 634,174,976.40

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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.