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Finding the Fourth Proportional to 321,130.71, 443,160.72 and 177,887.75

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Solution

The fourth proportional to 321,130.71, 443,160.72 and 177,887.75 is: 245,485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,130.71 : 443,160.72 = 177,887.75 : x
  2. Step 2: Convert to fraction form
    321,130.71/443,160.72 = 177,887.75/x
  3. Step 3: Cross multiply
    321,130.71x = 443,160.72 × 177,887.75
  4. Step 4: Simplify right side
    321,130.71x = 78,832,861,153.38
  5. Step 5: Solve for x
    x = 78,832,861,153.38/321,130.71
  6. Step 6: Final answer
    x = 245,485.28

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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.