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Finding the Fourth Proportional to 316,263.69, 436,400.87 and 188,912.25

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Solution

The fourth proportional to 316,263.69, 436,400.87 and 188,912.25 is: 260,673.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,263.69 : 436,400.87 = 188,912.25 : x
  2. Step 2: Convert to fraction form
    316,263.69/436,400.87 = 188,912.25/x
  3. Step 3: Cross multiply
    316,263.69x = 436,400.87 × 188,912.25
  4. Step 4: Simplify right side
    316,263.69x = 82,441,469,309.10
  5. Step 5: Solve for x
    x = 82,441,469,309.10/316,263.69
  6. Step 6: Final answer
    x = 260,673.20

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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.