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Finding the Fourth Proportional to 1,993,940.40, 2,988,869.40 and 981,505.20

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Solution

The fourth proportional to 1,993,940.40, 2,988,869.40 and 981,505.20 is: 1,471,253.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,940.40 : 2,988,869.40 = 981,505.20 : x
  2. Step 2: Convert to fraction form
    1,993,940.40/2,988,869.40 = 981,505.20/x
  3. Step 3: Cross multiply
    1,993,940.40x = 2,988,869.40 × 981,505.20
  4. Step 4: Simplify right side
    1,993,940.40x = 2,933,590,858,220.88
  5. Step 5: Solve for x
    x = 2,933,590,858,220.88/1,993,940.40
  6. Step 6: Final answer
    x = 1,471,253.03

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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.