Home / 826,469.11-1,239,137.71-420,876.21

Finding the Fourth Proportional to 826,469.11, 1,239,137.71 and 420,876.21

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Solution

The fourth proportional to 826,469.11, 1,239,137.71 and 420,876.21 is: 631,026.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,469.11 : 1,239,137.71 = 420,876.21 : x
  2. Step 2: Convert to fraction form
    826,469.11/1,239,137.71 = 420,876.21/x
  3. Step 3: Cross multiply
    826,469.11x = 1,239,137.71 × 420,876.21
  4. Step 4: Simplify right side
    826,469.11x = 521,523,583,052.88
  5. Step 5: Solve for x
    x = 521,523,583,052.88/826,469.11
  6. Step 6: Final answer
    x = 631,026.10

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1.5x scale

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.