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Finding the Fourth Proportional to 543,234.80, 815,466.60 and 321,743.60

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Solution

The fourth proportional to 543,234.80, 815,466.60 and 321,743.60 is: 482,979.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,234.80 : 815,466.60 = 321,743.60 : x
  2. Step 2: Convert to fraction form
    543,234.80/815,466.60 = 321,743.60/x
  3. Step 3: Cross multiply
    543,234.80x = 815,466.60 × 321,743.60
  4. Step 4: Simplify right side
    543,234.80x = 262,371,159,563.76
  5. Step 5: Solve for x
    x = 262,371,159,563.76/543,234.80
  6. Step 6: Final answer
    x = 482,979.29

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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.