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Finding the Fourth Proportional to 419,609.87, 629,963.51 and 249,142.74

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Solution

The fourth proportional to 419,609.87, 629,963.51 and 249,142.74 is: 374,039.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,609.87 : 629,963.51 = 249,142.74 : x
  2. Step 2: Convert to fraction form
    419,609.87/629,963.51 = 249,142.74/x
  3. Step 3: Cross multiply
    419,609.87x = 629,963.51 × 249,142.74
  4. Step 4: Simplify right side
    419,609.87x = 156,950,833,735.70
  5. Step 5: Solve for x
    x = 156,950,833,735.70/419,609.87
  6. Step 6: Final answer
    x = 374,039.90

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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.