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Finding the Fourth Proportional to 405,842.70, 608,850.45 and 125,388.30

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Solution

The fourth proportional to 405,842.70, 608,850.45 and 125,388.30 is: 188,109.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,842.70 : 608,850.45 = 125,388.30 : x
  2. Step 2: Convert to fraction form
    405,842.70/608,850.45 = 125,388.30/x
  3. Step 3: Cross multiply
    405,842.70x = 608,850.45 × 125,388.30
  4. Step 4: Simplify right side
    405,842.70x = 76,342,722,879.74
  5. Step 5: Solve for x
    x = 76,342,722,879.74/405,842.70
  6. Step 6: Final answer
    x = 188,109.14

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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.