Home / 1,222,215.50-1,686,736.20-678,351.30

Finding the Fourth Proportional to 1,222,215.50, 1,686,736.20 and 678,351.30

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Solution

The fourth proportional to 1,222,215.50, 1,686,736.20 and 678,351.30 is: 936,168.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,215.50 : 1,686,736.20 = 678,351.30 : x
  2. Step 2: Convert to fraction form
    1,222,215.50/1,686,736.20 = 678,351.30/x
  3. Step 3: Cross multiply
    1,222,215.50x = 1,686,736.20 × 678,351.30
  4. Step 4: Simplify right side
    1,222,215.50x = 1,144,199,694,027.06
  5. Step 5: Solve for x
    x = 1,144,199,694,027.06/1,222,215.50
  6. Step 6: Final answer
    x = 936,168.53

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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.