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Finding the Fourth Proportional to 419,944.20, 629,916.30 and 260,511.90

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Solution

The fourth proportional to 419,944.20, 629,916.30 and 260,511.90 is: 390,767.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,944.20 : 629,916.30 = 260,511.90 : x
  2. Step 2: Convert to fraction form
    419,944.20/629,916.30 = 260,511.90/x
  3. Step 3: Cross multiply
    419,944.20x = 629,916.30 × 260,511.90
  4. Step 4: Simplify right side
    419,944.20x = 164,100,692,153.97
  5. Step 5: Solve for x
    x = 164,100,692,153.97/419,944.20
  6. Step 6: Final answer
    x = 390,767.85

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Similar ratio
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1.5x scale

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.