Home / 1,280,689.78-1,922,112.36-640,801.54

Finding the Fourth Proportional to 1,280,689.78, 1,922,112.36 and 640,801.54

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Solution

The fourth proportional to 1,280,689.78, 1,922,112.36 and 640,801.54 is: 961,741.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,689.78 : 1,922,112.36 = 640,801.54 : x
  2. Step 2: Convert to fraction form
    1,280,689.78/1,922,112.36 = 640,801.54/x
  3. Step 3: Cross multiply
    1,280,689.78x = 1,922,112.36 × 640,801.54
  4. Step 4: Simplify right side
    1,280,689.78x = 1,231,692,560,341.03
  5. Step 5: Solve for x
    x = 1,231,692,560,341.03/1,280,689.78
  6. Step 6: Final answer
    x = 961,741.54

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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.