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Finding the Fourth Proportional to 450,007.80, 674,234.10 and 212,839.80

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Solution

The fourth proportional to 450,007.80, 674,234.10 and 212,839.80 is: 318,891.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,007.80 : 674,234.10 = 212,839.80 : x
  2. Step 2: Convert to fraction form
    450,007.80/674,234.10 = 212,839.80/x
  3. Step 3: Cross multiply
    450,007.80x = 674,234.10 × 212,839.80
  4. Step 4: Simplify right side
    450,007.80x = 143,503,850,997.18
  5. Step 5: Solve for x
    x = 143,503,850,997.18/450,007.80
  6. Step 6: Final answer
    x = 318,891.92

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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.