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Finding the Fourth Proportional to 260,766.60, 391,149.90 and 102,913.80

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Solution

The fourth proportional to 260,766.60, 391,149.90 and 102,913.80 is: 154,370.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,766.60 : 391,149.90 = 102,913.80 : x
  2. Step 2: Convert to fraction form
    260,766.60/391,149.90 = 102,913.80/x
  3. Step 3: Cross multiply
    260,766.60x = 391,149.90 × 102,913.80
  4. Step 4: Simplify right side
    260,766.60x = 40,254,722,578.62
  5. Step 5: Solve for x
    x = 40,254,722,578.62/260,766.60
  6. Step 6: Final answer
    x = 154,370.70

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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.