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Finding the Fourth Proportional to 411,400.60, 617,100.90 and 328,456.60

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Solution

The fourth proportional to 411,400.60, 617,100.90 and 328,456.60 is: 492,684.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,400.60 : 617,100.90 = 328,456.60 : x
  2. Step 2: Convert to fraction form
    411,400.60/617,100.90 = 328,456.60/x
  3. Step 3: Cross multiply
    411,400.60x = 617,100.90 × 328,456.60
  4. Step 4: Simplify right side
    411,400.60x = 202,690,863,470.94
  5. Step 5: Solve for x
    x = 202,690,863,470.94/411,400.60
  6. Step 6: Final answer
    x = 492,684.90

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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.