Home / 1,222,190.76-1,686,641.58-678,361.80

Finding the Fourth Proportional to 1,222,190.76, 1,686,641.58 and 678,361.80

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Solution

The fourth proportional to 1,222,190.76, 1,686,641.58 and 678,361.80 is: 936,149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,190.76 : 1,686,641.58 = 678,361.80 : x
  2. Step 2: Convert to fraction form
    1,222,190.76/1,686,641.58 = 678,361.80/x
  3. Step 3: Cross multiply
    1,222,190.76x = 1,686,641.58 × 678,361.80
  4. Step 4: Simplify right side
    1,222,190.76x = 1,144,153,218,163.64
  5. Step 5: Solve for x
    x = 1,144,153,218,163.64/1,222,190.76
  6. Step 6: Final answer
    x = 936,149.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.