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Finding the Fourth Proportional to 1,383,500, 1,909,259.16 and 779,888

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Solution

The fourth proportional to 1,383,500, 1,909,259.16 and 779,888 is: 1,076,261.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,500 : 1,909,259.16 = 779,888 : x
  2. Step 2: Convert to fraction form
    1,383,500/1,909,259.16 = 779,888/x
  3. Step 3: Cross multiply
    1,383,500x = 1,909,259.16 × 779,888
  4. Step 4: Simplify right side
    1,383,500x = 1,489,008,307,774.08
  5. Step 5: Solve for x
    x = 1,489,008,307,774.08/1,383,500
  6. Step 6: Final answer
    x = 1,076,261.88

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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.