Home / 1,391,724.27-1,920,546.90-818,801.28

Finding the Fourth Proportional to 1,391,724.27, 1,920,546.90 and 818,801.28

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Solution

The fourth proportional to 1,391,724.27, 1,920,546.90 and 818,801.28 is: 1,129,926.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,724.27 : 1,920,546.90 = 818,801.28 : x
  2. Step 2: Convert to fraction form
    1,391,724.27/1,920,546.90 = 818,801.28/x
  3. Step 3: Cross multiply
    1,391,724.27x = 1,920,546.90 × 818,801.28
  4. Step 4: Simplify right side
    1,391,724.27x = 1,572,546,260,020.03
  5. Step 5: Solve for x
    x = 1,572,546,260,020.03/1,391,724.27
  6. Step 6: Final answer
    x = 1,129,926.59

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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.