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Finding the Fourth Proportional to 321,245.40, 443,318.22 and 178,014.72

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Solution

The fourth proportional to 321,245.40, 443,318.22 and 178,014.72 is: 245,660.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,245.40 : 443,318.22 = 178,014.72 : x
  2. Step 2: Convert to fraction form
    321,245.40/443,318.22 = 178,014.72/x
  3. Step 3: Cross multiply
    321,245.40x = 443,318.22 × 178,014.72
  4. Step 4: Simplify right side
    321,245.40x = 78,917,168,804.20
  5. Step 5: Solve for x
    x = 78,917,168,804.20/321,245.40
  6. Step 6: Final answer
    x = 245,660.07

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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.