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Finding the Fourth Proportional to 321,464.56, 443,620.36 and 178,220.92

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Solution

The fourth proportional to 321,464.56, 443,620.36 and 178,220.92 is: 245,944.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,464.56 : 443,620.36 = 178,220.92 : x
  2. Step 2: Convert to fraction form
    321,464.56/443,620.36 = 178,220.92/x
  3. Step 3: Cross multiply
    321,464.56x = 443,620.36 × 178,220.92
  4. Step 4: Simplify right side
    321,464.56x = 79,062,428,689.93
  5. Step 5: Solve for x
    x = 79,062,428,689.93/321,464.56
  6. Step 6: Final answer
    x = 245,944.46

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Double scale
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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.