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Finding the Fourth Proportional to 321,604.20, 443,840.36 and 178,410.40

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Solution

The fourth proportional to 321,604.20, 443,840.36 and 178,410.40 is: 246,221.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,604.20 : 443,840.36 = 178,410.40 : x
  2. Step 2: Convert to fraction form
    321,604.20/443,840.36 = 178,410.40/x
  3. Step 3: Cross multiply
    321,604.20x = 443,840.36 × 178,410.40
  4. Step 4: Simplify right side
    321,604.20x = 79,185,736,163.74
  5. Step 5: Solve for x
    x = 79,185,736,163.74/321,604.20
  6. Step 6: Final answer
    x = 246,221.09

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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.