Home / 1,391,886.10-1,920,962.73-780,204.34

Finding the Fourth Proportional to 1,391,886.10, 1,920,962.73 and 780,204.34

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Solution

The fourth proportional to 1,391,886.10, 1,920,962.73 and 780,204.34 is: 1,076,771.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,886.10 : 1,920,962.73 = 780,204.34 : x
  2. Step 2: Convert to fraction form
    1,391,886.10/1,920,962.73 = 780,204.34/x
  3. Step 3: Cross multiply
    1,391,886.10x = 1,920,962.73 × 780,204.34
  4. Step 4: Simplify right side
    1,391,886.10x = 1,498,743,458,924.25
  5. Step 5: Solve for x
    x = 1,498,743,458,924.25/1,391,886.10
  6. Step 6: Final answer
    x = 1,076,771.63

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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.