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Finding the Fourth Proportional to 389,467.40, 584,201.10 and 220,922.60

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Solution

The fourth proportional to 389,467.40, 584,201.10 and 220,922.60 is: 331,383.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,467.40 : 584,201.10 = 220,922.60 : x
  2. Step 2: Convert to fraction form
    389,467.40/584,201.10 = 220,922.60/x
  3. Step 3: Cross multiply
    389,467.40x = 584,201.10 × 220,922.60
  4. Step 4: Simplify right side
    389,467.40x = 129,063,225,934.86
  5. Step 5: Solve for x
    x = 129,063,225,934.86/389,467.40
  6. Step 6: Final answer
    x = 331,383.90

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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.