Home / 509,623.20-764,780.40-331,696.80

Finding the Fourth Proportional to 509,623.20, 764,780.40 and 331,696.80

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Solution

The fourth proportional to 509,623.20, 764,780.40 and 331,696.80 is: 497,770.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,623.20 : 764,780.40 = 331,696.80 : x
  2. Step 2: Convert to fraction form
    509,623.20/764,780.40 = 331,696.80/x
  3. Step 3: Cross multiply
    509,623.20x = 764,780.40 × 331,696.80
  4. Step 4: Simplify right side
    509,623.20x = 253,675,211,382.72
  5. Step 5: Solve for x
    x = 253,675,211,382.72/509,623.20
  6. Step 6: Final answer
    x = 497,770.14

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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.