Home / 820,181.80-1,230,579.90-321,903.40

Finding the Fourth Proportional to 820,181.80, 1,230,579.90 and 321,903.40

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Solution

The fourth proportional to 820,181.80, 1,230,579.90 and 321,903.40 is: 482,975.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,181.80 : 1,230,579.90 = 321,903.40 : x
  2. Step 2: Convert to fraction form
    820,181.80/1,230,579.90 = 321,903.40/x
  3. Step 3: Cross multiply
    820,181.80x = 1,230,579.90 × 321,903.40
  4. Step 4: Simplify right side
    820,181.80x = 396,127,853,781.66
  5. Step 5: Solve for x
    x = 396,127,853,781.66/820,181.80
  6. Step 6: Final answer
    x = 482,975.67

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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.