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Finding the Fourth Proportional to 260,843.20, 391,394.40 and 103,076.80

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Solution

The fourth proportional to 260,843.20, 391,394.40 and 103,076.80 is: 154,666.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,843.20 : 391,394.40 = 103,076.80 : x
  2. Step 2: Convert to fraction form
    260,843.20/391,394.40 = 103,076.80/x
  3. Step 3: Cross multiply
    260,843.20x = 391,394.40 × 103,076.80
  4. Step 4: Simplify right side
    260,843.20x = 40,343,682,289.92
  5. Step 5: Solve for x
    x = 40,343,682,289.92/260,843.20
  6. Step 6: Final answer
    x = 154,666.41

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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.