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Finding the Fourth Proportional to 321,465.56, 443,621.74 and 178,221.92

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Solution

The fourth proportional to 321,465.56, 443,621.74 and 178,221.92 is: 245,945.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,465.56 : 443,621.74 = 178,221.92 : x
  2. Step 2: Convert to fraction form
    321,465.56/443,621.74 = 178,221.92/x
  3. Step 3: Cross multiply
    321,465.56x = 443,621.74 × 178,221.92
  4. Step 4: Simplify right side
    321,465.56x = 79,063,118,256.54
  5. Step 5: Solve for x
    x = 79,063,118,256.54/321,465.56
  6. Step 6: Final answer
    x = 245,945.84

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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.