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Finding the Fourth Proportional to 421,914.38, 632,790.93 and 126,426.38

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Solution

The fourth proportional to 421,914.38, 632,790.93 and 126,426.38 is: 189,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,914.38 : 632,790.93 = 126,426.38 : x
  2. Step 2: Convert to fraction form
    421,914.38/632,790.93 = 126,426.38/x
  3. Step 3: Cross multiply
    421,914.38x = 632,790.93 × 126,426.38
  4. Step 4: Simplify right side
    421,914.38x = 80,001,464,362.62
  5. Step 5: Solve for x
    x = 80,001,464,362.62/421,914.38
  6. Step 6: Final answer
    x = 189,615.40

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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.