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Finding the Fourth Proportional to 303,640.40, 455,590.20 and 145,787.60

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Solution

The fourth proportional to 303,640.40, 455,590.20 and 145,787.60 is: 218,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,640.40 : 455,590.20 = 145,787.60 : x
  2. Step 2: Convert to fraction form
    303,640.40/455,590.20 = 145,787.60/x
  3. Step 3: Cross multiply
    303,640.40x = 455,590.20 × 145,787.60
  4. Step 4: Simplify right side
    303,640.40x = 66,419,401,841.52
  5. Step 5: Solve for x
    x = 66,419,401,841.52/303,640.40
  6. Step 6: Final answer
    x = 218,743.63

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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.