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Finding the Fourth Proportional to 421,556.66, 632,207.36 and 221,766.86

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Solution

The fourth proportional to 421,556.66, 632,207.36 and 221,766.86 is: 332,583.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,556.66 : 632,207.36 = 221,766.86 : x
  2. Step 2: Convert to fraction form
    421,556.66/632,207.36 = 221,766.86/x
  3. Step 3: Cross multiply
    421,556.66x = 632,207.36 × 221,766.86
  4. Step 4: Simplify right side
    421,556.66x = 140,202,641,096.09
  5. Step 5: Solve for x
    x = 140,202,641,096.09/421,556.66
  6. Step 6: Final answer
    x = 332,583.15

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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.