Home / 643,828.20-965,742.30-405,882.60

Finding the Fourth Proportional to 643,828.20, 965,742.30 and 405,882.60

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Solution

The fourth proportional to 643,828.20, 965,742.30 and 405,882.60 is: 608,823.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,828.20 : 965,742.30 = 405,882.60 : x
  2. Step 2: Convert to fraction form
    643,828.20/965,742.30 = 405,882.60/x
  3. Step 3: Cross multiply
    643,828.20x = 965,742.30 × 405,882.60
  4. Step 4: Simplify right side
    643,828.20x = 391,977,995,653.98
  5. Step 5: Solve for x
    x = 391,977,995,653.98/643,828.20
  6. Step 6: Final answer
    x = 608,823.90

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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.