Home / 1,245,999.20-1,868,998.80-820,846.40

Finding the Fourth Proportional to 1,245,999.20, 1,868,998.80 and 820,846.40

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Solution

The fourth proportional to 1,245,999.20, 1,868,998.80 and 820,846.40 is: 1,231,269.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,999.20 : 1,868,998.80 = 820,846.40 : x
  2. Step 2: Convert to fraction form
    1,245,999.20/1,868,998.80 = 820,846.40/x
  3. Step 3: Cross multiply
    1,245,999.20x = 1,868,998.80 × 820,846.40
  4. Step 4: Simplify right side
    1,245,999.20x = 1,534,160,936,584.32
  5. Step 5: Solve for x
    x = 1,534,160,936,584.32/1,245,999.20
  6. Step 6: Final answer
    x = 1,231,269.60

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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.