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Finding the Fourth Proportional to 320,676.57, 480,978 and 84,037.91

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Solution

The fourth proportional to 320,676.57, 480,978 and 84,037.91 is: 126,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,676.57 : 480,978 = 84,037.91 : x
  2. Step 2: Convert to fraction form
    320,676.57/480,978 = 84,037.91/x
  3. Step 3: Cross multiply
    320,676.57x = 480,978 × 84,037.91
  4. Step 4: Simplify right side
    320,676.57x = 40,420,383,471.09
  5. Step 5: Solve for x
    x = 40,420,383,471.09/320,676.57
  6. Step 6: Final answer
    x = 126,047.20

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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.