Home / 260,827.20-391,125.60-120,628.80

Finding the Fourth Proportional to 260,827.20, 391,125.60 and 120,628.80

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Solution

The fourth proportional to 260,827.20, 391,125.60 and 120,628.80 is: 180,889.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,827.20 : 391,125.60 = 120,628.80 : x
  2. Step 2: Convert to fraction form
    260,827.20/391,125.60 = 120,628.80/x
  3. Step 3: Cross multiply
    260,827.20x = 391,125.60 × 120,628.80
  4. Step 4: Simplify right side
    260,827.20x = 47,181,011,777.28
  5. Step 5: Solve for x
    x = 47,181,011,777.28/260,827.20
  6. Step 6: Final answer
    x = 180,889.92

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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.