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Finding the Fourth Proportional to 543,375.80, 815,063.70 and 262,921.40

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Solution

The fourth proportional to 543,375.80, 815,063.70 and 262,921.40 is: 394,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,375.80 : 815,063.70 = 262,921.40 : x
  2. Step 2: Convert to fraction form
    543,375.80/815,063.70 = 262,921.40/x
  3. Step 3: Cross multiply
    543,375.80x = 815,063.70 × 262,921.40
  4. Step 4: Simplify right side
    543,375.80x = 214,297,689,093.18
  5. Step 5: Solve for x
    x = 214,297,689,093.18/543,375.80
  6. Step 6: Final answer
    x = 394,382.10

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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.