Home / 780,139.20-1,169,560.80-331,204.80

Finding the Fourth Proportional to 780,139.20, 1,169,560.80 and 331,204.80

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Solution

The fourth proportional to 780,139.20, 1,169,560.80 and 331,204.80 is: 496,532.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,139.20 : 1,169,560.80 = 331,204.80 : x
  2. Step 2: Convert to fraction form
    780,139.20/1,169,560.80 = 331,204.80/x
  3. Step 3: Cross multiply
    780,139.20x = 1,169,560.80 × 331,204.80
  4. Step 4: Simplify right side
    780,139.20x = 387,364,150,851.84
  5. Step 5: Solve for x
    x = 387,364,150,851.84/780,139.20
  6. Step 6: Final answer
    x = 496,532.09

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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.