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Finding the Fourth Proportional to 1,387,277, 1,914,597.78 and 783,703.88

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Solution

The fourth proportional to 1,387,277, 1,914,597.78 and 783,703.88 is: 1,081,599.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,277 : 1,914,597.78 = 783,703.88 : x
  2. Step 2: Convert to fraction form
    1,387,277/1,914,597.78 = 783,703.88/x
  3. Step 3: Cross multiply
    1,387,277x = 1,914,597.78 × 783,703.88
  4. Step 4: Simplify right side
    1,387,277x = 1,500,477,708,825.39
  5. Step 5: Solve for x
    x = 1,500,477,708,825.39/1,387,277
  6. Step 6: Final answer
    x = 1,081,599.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.