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Finding the Fourth Proportional to 260,704.32, 391,204.42 and 140,759.68

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Solution

The fourth proportional to 260,704.32, 391,204.42 and 140,759.68 is: 211,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,704.32 : 391,204.42 = 140,759.68 : x
  2. Step 2: Convert to fraction form
    260,704.32/391,204.42 = 140,759.68/x
  3. Step 3: Cross multiply
    260,704.32x = 391,204.42 × 140,759.68
  4. Step 4: Simplify right side
    260,704.32x = 55,065,808,973.79
  5. Step 5: Solve for x
    x = 55,065,808,973.79/260,704.32
  6. Step 6: Final answer
    x = 211,219.40

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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.