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Finding the Fourth Proportional to 856,745.80, 1,285,181.70 and 225,655

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Solution

The fourth proportional to 856,745.80, 1,285,181.70 and 225,655 is: 338,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,745.80 : 1,285,181.70 = 225,655 : x
  2. Step 2: Convert to fraction form
    856,745.80/1,285,181.70 = 225,655/x
  3. Step 3: Cross multiply
    856,745.80x = 1,285,181.70 × 225,655
  4. Step 4: Simplify right side
    856,745.80x = 290,007,676,513.50
  5. Step 5: Solve for x
    x = 290,007,676,513.50/856,745.80
  6. Step 6: Final answer
    x = 338,499.09

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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.