Home / 1,291,976-1,937,981.28-405,512

Finding the Fourth Proportional to 1,291,976, 1,937,981.28 and 405,512

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Solution

The fourth proportional to 1,291,976, 1,937,981.28 and 405,512 is: 608,273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,976 : 1,937,981.28 = 405,512 : x
  2. Step 2: Convert to fraction form
    1,291,976/1,937,981.28 = 405,512/x
  3. Step 3: Cross multiply
    1,291,976x = 1,937,981.28 × 405,512
  4. Step 4: Simplify right side
    1,291,976x = 785,874,664,815.36
  5. Step 5: Solve for x
    x = 785,874,664,815.36/1,291,976
  6. Step 6: Final answer
    x = 608,273.42

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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.