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Finding the Fourth Proportional to 321,345.44, 443,440.68 and 178,104.20

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Solution

The fourth proportional to 321,345.44, 443,440.68 and 178,104.20 is: 245,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,345.44 : 443,440.68 = 178,104.20 : x
  2. Step 2: Convert to fraction form
    321,345.44/443,440.68 = 178,104.20/x
  3. Step 3: Cross multiply
    321,345.44x = 443,440.68 × 178,104.20
  4. Step 4: Simplify right side
    321,345.44x = 78,978,647,558.86
  5. Step 5: Solve for x
    x = 78,978,647,558.86/321,345.44
  6. Step 6: Final answer
    x = 245,774.91

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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.