Home / 320,512.20-480,185.10-261,025.80

Finding the Fourth Proportional to 320,512.20, 480,185.10 and 261,025.80

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Solution

The fourth proportional to 320,512.20, 480,185.10 and 261,025.80 is: 391,063.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,512.20 : 480,185.10 = 261,025.80 : x
  2. Step 2: Convert to fraction form
    320,512.20/480,185.10 = 261,025.80/x
  3. Step 3: Cross multiply
    320,512.20x = 480,185.10 × 261,025.80
  4. Step 4: Simplify right side
    320,512.20x = 125,340,699,875.58
  5. Step 5: Solve for x
    x = 125,340,699,875.58/320,512.20
  6. Step 6: Final answer
    x = 391,063.74

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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.