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Finding the Fourth Proportional to 449,638.80, 674,350.20 and 259,688.40

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Solution

The fourth proportional to 449,638.80, 674,350.20 and 259,688.40 is: 389,470.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,638.80 : 674,350.20 = 259,688.40 : x
  2. Step 2: Convert to fraction form
    449,638.80/674,350.20 = 259,688.40/x
  3. Step 3: Cross multiply
    449,638.80x = 674,350.20 × 259,688.40
  4. Step 4: Simplify right side
    449,638.80x = 175,120,924,477.68
  5. Step 5: Solve for x
    x = 175,120,924,477.68/449,638.80
  6. Step 6: Final answer
    x = 389,470.22

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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.