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Finding the Fourth Proportional to 321,156.80, 443,223.60 and 177,961.76

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Solution

The fourth proportional to 321,156.80, 443,223.60 and 177,961.76 is: 245,602.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,156.80 : 443,223.60 = 177,961.76 : x
  2. Step 2: Convert to fraction form
    321,156.80/443,223.60 = 177,961.76/x
  3. Step 3: Cross multiply
    321,156.80x = 443,223.60 × 177,961.76
  4. Step 4: Simplify right side
    321,156.80x = 78,876,851,929.54
  5. Step 5: Solve for x
    x = 78,876,851,929.54/321,156.80
  6. Step 6: Final answer
    x = 245,602.31

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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.