Home / 1,287,065.96-1,930,650.78-612,800.36

Finding the Fourth Proportional to 1,287,065.96, 1,930,650.78 and 612,800.36

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Solution

The fourth proportional to 1,287,065.96, 1,930,650.78 and 612,800.36 is: 919,225.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,065.96 : 1,930,650.78 = 612,800.36 : x
  2. Step 2: Convert to fraction form
    1,287,065.96/1,930,650.78 = 612,800.36/x
  3. Step 3: Cross multiply
    1,287,065.96x = 1,930,650.78 × 612,800.36
  4. Step 4: Simplify right side
    1,287,065.96x = 1,183,103,493,018.28
  5. Step 5: Solve for x
    x = 1,183,103,493,018.28/1,287,065.96
  6. Step 6: Final answer
    x = 919,225.22

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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.