Home / 1,213,999.80-1,820,999.70-415,210.20

Finding the Fourth Proportional to 1,213,999.80, 1,820,999.70 and 415,210.20

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Solution

The fourth proportional to 1,213,999.80, 1,820,999.70 and 415,210.20 is: 622,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,999.80 : 1,820,999.70 = 415,210.20 : x
  2. Step 2: Convert to fraction form
    1,213,999.80/1,820,999.70 = 415,210.20/x
  3. Step 3: Cross multiply
    1,213,999.80x = 1,820,999.70 × 415,210.20
  4. Step 4: Simplify right side
    1,213,999.80x = 756,097,649,636.94
  5. Step 5: Solve for x
    x = 756,097,649,636.94/1,213,999.80
  6. Step 6: Final answer
    x = 622,815.30

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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.