Home / 1,939,796.70-2,912,805.45-1,311,495.90

Finding the Fourth Proportional to 1,939,796.70, 2,912,805.45 and 1,311,495.90

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Solution

The fourth proportional to 1,939,796.70, 2,912,805.45 and 1,311,495.90 is: 1,969,346.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939,796.70 : 2,912,805.45 = 1,311,495.90 : x
  2. Step 2: Convert to fraction form
    1,939,796.70/2,912,805.45 = 1,311,495.90/x
  3. Step 3: Cross multiply
    1,939,796.70x = 2,912,805.45 × 1,311,495.90
  4. Step 4: Simplify right side
    1,939,796.70x = 3,820,132,405,172.66
  5. Step 5: Solve for x
    x = 3,820,132,405,172.66/1,939,796.70
  6. Step 6: Final answer
    x = 1,969,346.79

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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.