Home / 1,212,321.80-1,821,981.90-1,191,326.60

Finding the Fourth Proportional to 1,212,321.80, 1,821,981.90 and 1,191,326.60

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Solution

The fourth proportional to 1,212,321.80, 1,821,981.90 and 1,191,326.60 is: 1,790,428.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,321.80 : 1,821,981.90 = 1,191,326.60 : x
  2. Step 2: Convert to fraction form
    1,212,321.80/1,821,981.90 = 1,191,326.60/x
  3. Step 3: Cross multiply
    1,212,321.80x = 1,821,981.90 × 1,191,326.60
  4. Step 4: Simplify right side
    1,212,321.80x = 2,170,575,502,188.54
  5. Step 5: Solve for x
    x = 2,170,575,502,188.54/1,212,321.80
  6. Step 6: Final answer
    x = 1,790,428.50

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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.