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Finding the Fourth Proportional to 3,639,978.40, 5,464,114.80 and 2,144,912.80

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Solution

The fourth proportional to 3,639,978.40, 5,464,114.80 and 2,144,912.80 is: 3,219,813.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639,978.40 : 5,464,114.80 = 2,144,912.80 : x
  2. Step 2: Convert to fraction form
    3,639,978.40/5,464,114.80 = 2,144,912.80/x
  3. Step 3: Cross multiply
    3,639,978.40x = 5,464,114.80 × 2,144,912.80
  4. Step 4: Simplify right side
    3,639,978.40x = 11,720,049,775,189.44
  5. Step 5: Solve for x
    x = 11,720,049,775,189.44/3,639,978.40
  6. Step 6: Final answer
    x = 3,219,813.00

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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.