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Finding the Fourth Proportional to 543,404.80, 815,721.60 and 321,913.60

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Solution

The fourth proportional to 543,404.80, 815,721.60 and 321,913.60 is: 483,234.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,404.80 : 815,721.60 = 321,913.60 : x
  2. Step 2: Convert to fraction form
    543,404.80/815,721.60 = 321,913.60/x
  3. Step 3: Cross multiply
    543,404.80x = 815,721.60 × 321,913.60
  4. Step 4: Simplify right side
    543,404.80x = 262,591,876,853.76
  5. Step 5: Solve for x
    x = 262,591,876,853.76/543,404.80
  6. Step 6: Final answer
    x = 483,234.37

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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.