Home / 509,739.20-764,954.40-331,812.80

Finding the Fourth Proportional to 509,739.20, 764,954.40 and 331,812.80

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Solution

The fourth proportional to 509,739.20, 764,954.40 and 331,812.80 is: 497,944.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,739.20 : 764,954.40 = 331,812.80 : x
  2. Step 2: Convert to fraction form
    509,739.20/764,954.40 = 331,812.80/x
  3. Step 3: Cross multiply
    509,739.20x = 764,954.40 × 331,812.80
  4. Step 4: Simplify right side
    509,739.20x = 253,821,661,336.32
  5. Step 5: Solve for x
    x = 253,821,661,336.32/509,739.20
  6. Step 6: Final answer
    x = 497,944.17

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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.