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Finding the Fourth Proportional to 326,761.78, 489,794.19 and 186,217.78

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Solution

The fourth proportional to 326,761.78, 489,794.19 and 186,217.78 is: 279,128.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,761.78 : 489,794.19 = 186,217.78 : x
  2. Step 2: Convert to fraction form
    326,761.78/489,794.19 = 186,217.78/x
  3. Step 3: Cross multiply
    326,761.78x = 489,794.19 × 186,217.78
  4. Step 4: Simplify right side
    326,761.78x = 91,208,386,718.70
  5. Step 5: Solve for x
    x = 91,208,386,718.70/326,761.78
  6. Step 6: Final answer
    x = 279,128.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.