Home / 815,676.92-1,221,651.66-389,511.28

Finding the Fourth Proportional to 815,676.92, 1,221,651.66 and 389,511.28

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Solution

The fourth proportional to 815,676.92, 1,221,651.66 and 389,511.28 is: 583,376.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,676.92 : 1,221,651.66 = 389,511.28 : x
  2. Step 2: Convert to fraction form
    815,676.92/1,221,651.66 = 389,511.28/x
  3. Step 3: Cross multiply
    815,676.92x = 1,221,651.66 × 389,511.28
  4. Step 4: Simplify right side
    815,676.92x = 475,847,101,800.73
  5. Step 5: Solve for x
    x = 475,847,101,800.73/815,676.92
  6. Step 6: Final answer
    x = 583,376.94

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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.