Home / 1,210,081.20-1,815,121.80-789,831.60

Finding the Fourth Proportional to 1,210,081.20, 1,815,121.80 and 789,831.60

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Solution

The fourth proportional to 1,210,081.20, 1,815,121.80 and 789,831.60 is: 1,184,747.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,081.20 : 1,815,121.80 = 789,831.60 : x
  2. Step 2: Convert to fraction form
    1,210,081.20/1,815,121.80 = 789,831.60/x
  3. Step 3: Cross multiply
    1,210,081.20x = 1,815,121.80 × 789,831.60
  4. Step 4: Simplify right side
    1,210,081.20x = 1,433,640,555,488.88
  5. Step 5: Solve for x
    x = 1,433,640,555,488.88/1,210,081.20
  6. Step 6: Final answer
    x = 1,184,747.40

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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.