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Finding the Fourth Proportional to 400,811.40, 601,217.10 and 394,590.60

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Solution

The fourth proportional to 400,811.40, 601,217.10 and 394,590.60 is: 591,885.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,811.40 : 601,217.10 = 394,590.60 : x
  2. Step 2: Convert to fraction form
    400,811.40/601,217.10 = 394,590.60/x
  3. Step 3: Cross multiply
    400,811.40x = 601,217.10 × 394,590.60
  4. Step 4: Simplify right side
    400,811.40x = 237,234,616,219.26
  5. Step 5: Solve for x
    x = 237,234,616,219.26/400,811.40
  6. Step 6: Final answer
    x = 591,885.90

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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.