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Finding the Fourth Proportional to 415,940.60, 623,910.90 and 317,636.60

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Solution

The fourth proportional to 415,940.60, 623,910.90 and 317,636.60 is: 476,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,940.60 : 623,910.90 = 317,636.60 : x
  2. Step 2: Convert to fraction form
    415,940.60/623,910.90 = 317,636.60/x
  3. Step 3: Cross multiply
    415,940.60x = 623,910.90 × 317,636.60
  4. Step 4: Simplify right side
    415,940.60x = 198,176,936,978.94
  5. Step 5: Solve for x
    x = 198,176,936,978.94/415,940.60
  6. Step 6: Final answer
    x = 476,454.90

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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.