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Finding the Fourth Proportional to 260,679.07, 391,060.79 and 80,722.20

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Solution

The fourth proportional to 260,679.07, 391,060.79 and 80,722.20 is: 121,096.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,679.07 : 391,060.79 = 80,722.20 : x
  2. Step 2: Convert to fraction form
    260,679.07/391,060.79 = 80,722.20/x
  3. Step 3: Cross multiply
    260,679.07x = 391,060.79 × 80,722.20
  4. Step 4: Simplify right side
    260,679.07x = 31,567,287,302.54
  5. Step 5: Solve for x
    x = 31,567,287,302.54/260,679.07
  6. Step 6: Final answer
    x = 121,096.36

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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.