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Finding the Fourth Proportional to 321,556.80, 443,719.31 and 178,316.40

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Solution

The fourth proportional to 321,556.80, 443,719.31 and 178,316.40 is: 246,060.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,556.80 : 443,719.31 = 178,316.40 : x
  2. Step 2: Convert to fraction form
    321,556.80/443,719.31 = 178,316.40/x
  3. Step 3: Cross multiply
    321,556.80x = 443,719.31 × 178,316.40
  4. Step 4: Simplify right side
    321,556.80x = 79,122,429,078.10
  5. Step 5: Solve for x
    x = 79,122,429,078.10/321,556.80
  6. Step 6: Final answer
    x = 246,060.51

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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.