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Finding the Fourth Proportional to 312,453.67, 431,221.13 and 176,496.37

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Solution

The fourth proportional to 312,453.67, 431,221.13 and 176,496.37 is: 243,584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,453.67 : 431,221.13 = 176,496.37 : x
  2. Step 2: Convert to fraction form
    312,453.67/431,221.13 = 176,496.37/x
  3. Step 3: Cross multiply
    312,453.67x = 431,221.13 × 176,496.37
  4. Step 4: Simplify right side
    312,453.67x = 76,108,964,348.50
  5. Step 5: Solve for x
    x = 76,108,964,348.50/312,453.67
  6. Step 6: Final answer
    x = 243,584.80

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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.