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Finding the Fourth Proportional to 442,893.40, 664,340.10 and 411,400.60

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Solution

The fourth proportional to 442,893.40, 664,340.10 and 411,400.60 is: 617,100.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,893.40 : 664,340.10 = 411,400.60 : x
  2. Step 2: Convert to fraction form
    442,893.40/664,340.10 = 411,400.60/x
  3. Step 3: Cross multiply
    442,893.40x = 664,340.10 × 411,400.60
  4. Step 4: Simplify right side
    442,893.40x = 273,309,915,744.06
  5. Step 5: Solve for x
    x = 273,309,915,744.06/442,893.40
  6. Step 6: Final answer
    x = 617,100.90

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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.