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Finding the Fourth Proportional to 405,999.30, 608,941.35 and 125,544.90

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Solution

The fourth proportional to 405,999.30, 608,941.35 and 125,544.90 is: 188,299.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,999.30 : 608,941.35 = 125,544.90 : x
  2. Step 2: Convert to fraction form
    405,999.30/608,941.35 = 125,544.90/x
  3. Step 3: Cross multiply
    405,999.30x = 608,941.35 × 125,544.90
  4. Step 4: Simplify right side
    405,999.30x = 76,449,480,891.62
  5. Step 5: Solve for x
    x = 76,449,480,891.62/405,999.30
  6. Step 6: Final answer
    x = 188,299.54

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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.