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Finding the Fourth Proportional to 391,766.40, 587,649.60 and 192,117.60

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Solution

The fourth proportional to 391,766.40, 587,649.60 and 192,117.60 is: 288,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,766.40 : 587,649.60 = 192,117.60 : x
  2. Step 2: Convert to fraction form
    391,766.40/587,649.60 = 192,117.60/x
  3. Step 3: Cross multiply
    391,766.40x = 587,649.60 × 192,117.60
  4. Step 4: Simplify right side
    391,766.40x = 112,897,830,792.96
  5. Step 5: Solve for x
    x = 112,897,830,792.96/391,766.40
  6. Step 6: Final answer
    x = 288,176.40

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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.