Home / 821,418.90-1,230,858.30-641,076.72

Finding the Fourth Proportional to 821,418.90, 1,230,858.30 and 641,076.72

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Solution

The fourth proportional to 821,418.90, 1,230,858.30 and 641,076.72 is: 960,623.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,418.90 : 1,230,858.30 = 641,076.72 : x
  2. Step 2: Convert to fraction form
    821,418.90/1,230,858.30 = 641,076.72/x
  3. Step 3: Cross multiply
    821,418.90x = 1,230,858.30 × 641,076.72
  4. Step 4: Simplify right side
    821,418.90x = 789,074,601,748.78
  5. Step 5: Solve for x
    x = 789,074,601,748.78/821,418.90
  6. Step 6: Final answer
    x = 960,623.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.