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Finding the Fourth Proportional to 321,680.95, 443,883.90 and 178,405.09

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Solution

The fourth proportional to 321,680.95, 443,883.90 and 178,405.09 is: 246,179.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,680.95 : 443,883.90 = 178,405.09 : x
  2. Step 2: Convert to fraction form
    321,680.95/443,883.90 = 178,405.09/x
  3. Step 3: Cross multiply
    321,680.95x = 443,883.90 × 178,405.09
  4. Step 4: Simplify right side
    321,680.95x = 79,191,147,129.05
  5. Step 5: Solve for x
    x = 79,191,147,129.05/321,680.95
  6. Step 6: Final answer
    x = 246,179.16

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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.