Home / 782,116.20-1,173,174.30-408,090.60

Finding the Fourth Proportional to 782,116.20, 1,173,174.30 and 408,090.60

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Solution

The fourth proportional to 782,116.20, 1,173,174.30 and 408,090.60 is: 612,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,116.20 : 1,173,174.30 = 408,090.60 : x
  2. Step 2: Convert to fraction form
    782,116.20/1,173,174.30 = 408,090.60/x
  3. Step 3: Cross multiply
    782,116.20x = 1,173,174.30 × 408,090.60
  4. Step 4: Simplify right side
    782,116.20x = 478,761,403,991.58
  5. Step 5: Solve for x
    x = 478,761,403,991.58/782,116.20
  6. Step 6: Final answer
    x = 612,135.90

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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.