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Finding the Fourth Proportional to 449,734.20, 620,632.80 and 248,530.20

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Solution

The fourth proportional to 449,734.20, 620,632.80 and 248,530.20 is: 342,971.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,734.20 : 620,632.80 = 248,530.20 : x
  2. Step 2: Convert to fraction form
    449,734.20/620,632.80 = 248,530.20/x
  3. Step 3: Cross multiply
    449,734.20x = 620,632.80 × 248,530.20
  4. Step 4: Simplify right side
    449,734.20x = 154,245,993,910.56
  5. Step 5: Solve for x
    x = 154,245,993,910.56/449,734.20
  6. Step 6: Final answer
    x = 342,971.46

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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.