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Finding the Fourth Proportional to 409,012.27, 613,551.21 and 142,766.89

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Solution

The fourth proportional to 409,012.27, 613,551.21 and 142,766.89 is: 214,161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,012.27 : 613,551.21 = 142,766.89 : x
  2. Step 2: Convert to fraction form
    409,012.27/613,551.21 = 142,766.89/x
  3. Step 3: Cross multiply
    409,012.27x = 613,551.21 × 142,766.89
  4. Step 4: Simplify right side
    409,012.27x = 87,594,798,107.44
  5. Step 5: Solve for x
    x = 87,594,798,107.44/409,012.27
  6. Step 6: Final answer
    x = 214,161.79

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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.