Home / 1,392,285.97-1,920,923.13-780,353.92

Finding the Fourth Proportional to 1,392,285.97, 1,920,923.13 and 780,353.92

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Solution

The fourth proportional to 1,392,285.97, 1,920,923.13 and 780,353.92 is: 1,076,646.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,285.97 : 1,920,923.13 = 780,353.92 : x
  2. Step 2: Convert to fraction form
    1,392,285.97/1,920,923.13 = 780,353.92/x
  3. Step 3: Cross multiply
    1,392,285.97x = 1,920,923.13 × 780,353.92
  4. Step 4: Simplify right side
    1,392,285.97x = 1,498,999,894,514.17
  5. Step 5: Solve for x
    x = 1,498,999,894,514.17/1,392,285.97
  6. Step 6: Final answer
    x = 1,076,646.56

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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.