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Finding the Fourth Proportional to 548,661.40, 821,679.90 and 443,685.40

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Solution

The fourth proportional to 548,661.40, 821,679.90 and 443,685.40 is: 664,466.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,661.40 : 821,679.90 = 443,685.40 : x
  2. Step 2: Convert to fraction form
    548,661.40/821,679.90 = 443,685.40/x
  3. Step 3: Cross multiply
    548,661.40x = 821,679.90 × 443,685.40
  4. Step 4: Simplify right side
    548,661.40x = 364,567,375,103.46
  5. Step 5: Solve for x
    x = 364,567,375,103.46/548,661.40
  6. Step 6: Final answer
    x = 664,466.96

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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.