Home / 427,289.82-640,885.77-111,777.18

Finding the Fourth Proportional to 427,289.82, 640,885.77 and 111,777.18

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Solution

The fourth proportional to 427,289.82, 640,885.77 and 111,777.18 is: 167,652.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,289.82 : 640,885.77 = 111,777.18 : x
  2. Step 2: Convert to fraction form
    427,289.82/640,885.77 = 111,777.18/x
  3. Step 3: Cross multiply
    427,289.82x = 640,885.77 × 111,777.18
  4. Step 4: Simplify right side
    427,289.82x = 71,636,404,072.73
  5. Step 5: Solve for x
    x = 71,636,404,072.73/427,289.82
  6. Step 6: Final answer
    x = 167,652.96

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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.