Home / 1,259,880.30-1,889,820.45-811,107.90

Finding the Fourth Proportional to 1,259,880.30, 1,889,820.45 and 811,107.90

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Solution

The fourth proportional to 1,259,880.30, 1,889,820.45 and 811,107.90 is: 1,216,661.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,880.30 : 1,889,820.45 = 811,107.90 : x
  2. Step 2: Convert to fraction form
    1,259,880.30/1,889,820.45 = 811,107.90/x
  3. Step 3: Cross multiply
    1,259,880.30x = 1,889,820.45 × 811,107.90
  4. Step 4: Simplify right side
    1,259,880.30x = 1,532,848,296,576.56
  5. Step 5: Solve for x
    x = 1,532,848,296,576.56/1,259,880.30
  6. Step 6: Final answer
    x = 1,216,661.85

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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.