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Finding the Fourth Proportional to 312,626.73, 431,419.22 and 176,657.79

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Solution

The fourth proportional to 312,626.73, 431,419.22 and 176,657.79 is: 243,784.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,626.73 : 431,419.22 = 176,657.79 : x
  2. Step 2: Convert to fraction form
    312,626.73/431,419.22 = 176,657.79/x
  3. Step 3: Cross multiply
    312,626.73x = 431,419.22 × 176,657.79
  4. Step 4: Simplify right side
    312,626.73x = 76,213,565,085.43
  5. Step 5: Solve for x
    x = 76,213,565,085.43/312,626.73
  6. Step 6: Final answer
    x = 243,784.54

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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.