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Finding the Fourth Proportional to 320,857.20, 481,285.80 and 84,223.80

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Solution

The fourth proportional to 320,857.20, 481,285.80 and 84,223.80 is: 126,335.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,857.20 : 481,285.80 = 84,223.80 : x
  2. Step 2: Convert to fraction form
    320,857.20/481,285.80 = 84,223.80/x
  3. Step 3: Cross multiply
    320,857.20x = 481,285.80 × 84,223.80
  4. Step 4: Simplify right side
    320,857.20x = 40,535,718,962.04
  5. Step 5: Solve for x
    x = 40,535,718,962.04/320,857.20
  6. Step 6: Final answer
    x = 126,335.70

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1.5x scale

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.