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Finding the Fourth Proportional to 312,885.15, 431,778.90 and 176,945.79

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Solution

The fourth proportional to 312,885.15, 431,778.90 and 176,945.79 is: 244,183.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,885.15 : 431,778.90 = 176,945.79 : x
  2. Step 2: Convert to fraction form
    312,885.15/431,778.90 = 176,945.79/x
  3. Step 3: Cross multiply
    312,885.15x = 431,778.90 × 176,945.79
  4. Step 4: Simplify right side
    312,885.15x = 76,401,458,565.83
  5. Step 5: Solve for x
    x = 76,401,458,565.83/312,885.15
  6. Step 6: Final answer
    x = 244,183.72

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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.