Home / 443,845.76-665,867.20-128,278.80

Finding the Fourth Proportional to 443,845.76, 665,867.20 and 128,278.80

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Solution

The fourth proportional to 443,845.76, 665,867.20 and 128,278.80 is: 192,446.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,845.76 : 665,867.20 = 128,278.80 : x
  2. Step 2: Convert to fraction form
    443,845.76/665,867.20 = 128,278.80/x
  3. Step 3: Cross multiply
    443,845.76x = 665,867.20 × 128,278.80
  4. Step 4: Simplify right side
    443,845.76x = 85,416,645,375.36
  5. Step 5: Solve for x
    x = 85,416,645,375.36/443,845.76
  6. Step 6: Final answer
    x = 192,446.69

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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.