Home / 811,982.89-1,120,460.46-485,231.05

Finding the Fourth Proportional to 811,982.89, 1,120,460.46 and 485,231.05

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Solution

The fourth proportional to 811,982.89, 1,120,460.46 and 485,231.05 is: 669,573.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,982.89 : 1,120,460.46 = 485,231.05 : x
  2. Step 2: Convert to fraction form
    811,982.89/1,120,460.46 = 485,231.05/x
  3. Step 3: Cross multiply
    811,982.89x = 1,120,460.46 × 485,231.05
  4. Step 4: Simplify right side
    811,982.89x = 543,682,208,351.77
  5. Step 5: Solve for x
    x = 543,682,208,351.77/811,982.89
  6. Step 6: Final answer
    x = 669,573.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.