Home / 1,280,690.78-1,922,113.86-640,802.54

Finding the Fourth Proportional to 1,280,690.78, 1,922,113.86 and 640,802.54

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Solution

The fourth proportional to 1,280,690.78, 1,922,113.86 and 640,802.54 is: 961,743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,690.78 : 1,922,113.86 = 640,802.54 : x
  2. Step 2: Convert to fraction form
    1,280,690.78/1,922,113.86 = 640,802.54/x
  3. Step 3: Cross multiply
    1,280,690.78x = 1,922,113.86 × 640,802.54
  4. Step 4: Simplify right side
    1,280,690.78x = 1,231,695,443,657.20
  5. Step 5: Solve for x
    x = 1,231,695,443,657.20/1,280,690.78
  6. Step 6: Final answer
    x = 961,743.04

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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.