Home / 1,213,999.80-1,820,999.70-415,015.80

Finding the Fourth Proportional to 1,213,999.80, 1,820,999.70 and 415,015.80

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Solution

The fourth proportional to 1,213,999.80, 1,820,999.70 and 415,015.80 is: 622,523.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,999.80 : 1,820,999.70 = 415,015.80 : x
  2. Step 2: Convert to fraction form
    1,213,999.80/1,820,999.70 = 415,015.80/x
  3. Step 3: Cross multiply
    1,213,999.80x = 1,820,999.70 × 415,015.80
  4. Step 4: Simplify right side
    1,213,999.80x = 755,743,647,295.26
  5. Step 5: Solve for x
    x = 755,743,647,295.26/1,213,999.80
  6. Step 6: Final answer
    x = 622,523.70

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1.5x scale

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.