Home / 465,816.75-643,315.05-320,999.09

Finding the Fourth Proportional to 465,816.75, 643,315.05 and 320,999.09

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Solution

The fourth proportional to 465,816.75, 643,315.05 and 320,999.09 is: 443,314.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,816.75 : 643,315.05 = 320,999.09 : x
  2. Step 2: Convert to fraction form
    465,816.75/643,315.05 = 320,999.09/x
  3. Step 3: Cross multiply
    465,816.75x = 643,315.05 × 320,999.09
  4. Step 4: Simplify right side
    465,816.75x = 206,503,542,416.73
  5. Step 5: Solve for x
    x = 206,503,542,416.73/465,816.75
  6. Step 6: Final answer
    x = 443,314.98

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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.