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Finding the Fourth Proportional to 449,830.80, 620,783.10 and 245,895.30

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Solution

The fourth proportional to 449,830.80, 620,783.10 and 245,895.30 is: 339,344.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,830.80 : 620,783.10 = 245,895.30 : x
  2. Step 2: Convert to fraction form
    449,830.80/620,783.10 = 245,895.30/x
  3. Step 3: Cross multiply
    449,830.80x = 620,783.10 × 245,895.30
  4. Step 4: Simplify right side
    449,830.80x = 152,647,646,609.43
  5. Step 5: Solve for x
    x = 152,647,646,609.43/449,830.80
  6. Step 6: Final answer
    x = 339,344.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.