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Finding the Fourth Proportional to 603,915.80, 905,983.05 and 303,640.70

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Solution

The fourth proportional to 603,915.80, 905,983.05 and 303,640.70 is: 455,516.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,915.80 : 905,983.05 = 303,640.70 : x
  2. Step 2: Convert to fraction form
    603,915.80/905,983.05 = 303,640.70/x
  3. Step 3: Cross multiply
    603,915.80x = 905,983.05 × 303,640.70
  4. Step 4: Simplify right side
    603,915.80x = 275,093,327,490.14
  5. Step 5: Solve for x
    x = 275,093,327,490.14/603,915.80
  6. Step 6: Final answer
    x = 455,516.03

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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.