Home / 1,222,760.21-1,687,461.86-678,896.03

Finding the Fourth Proportional to 1,222,760.21, 1,687,461.86 and 678,896.03

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Solution

The fourth proportional to 1,222,760.21, 1,687,461.86 and 678,896.03 is: 936,905.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,760.21 : 1,687,461.86 = 678,896.03 : x
  2. Step 2: Convert to fraction form
    1,222,760.21/1,687,461.86 = 678,896.03/x
  3. Step 3: Cross multiply
    1,222,760.21x = 1,687,461.86 × 678,896.03
  4. Step 4: Simplify right side
    1,222,760.21x = 1,145,611,163,446.31
  5. Step 5: Solve for x
    x = 1,145,611,163,446.31/1,222,760.21
  6. Step 6: Final answer
    x = 936,905.83

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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.