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Finding the Fourth Proportional to 321,636.56, 443,911.59 and 178,442.73

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Solution

The fourth proportional to 321,636.56, 443,911.59 and 178,442.73 is: 246,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,636.56 : 443,911.59 = 178,442.73 : x
  2. Step 2: Convert to fraction form
    321,636.56/443,911.59 = 178,442.73/x
  3. Step 3: Cross multiply
    321,636.56x = 443,911.59 × 178,442.73
  4. Step 4: Simplify right side
    321,636.56x = 79,212,795,998.24
  5. Step 5: Solve for x
    x = 79,212,795,998.24/321,636.56
  6. Step 6: Final answer
    x = 246,280.45

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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.