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Finding the Fourth Proportional to 320,630.90, 481,119.15 and 133,661.30

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Solution

The fourth proportional to 320,630.90, 481,119.15 and 133,661.30 is: 200,563.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,630.90 : 481,119.15 = 133,661.30 : x
  2. Step 2: Convert to fraction form
    320,630.90/481,119.15 = 133,661.30/x
  3. Step 3: Cross multiply
    320,630.90x = 481,119.15 × 133,661.30
  4. Step 4: Simplify right side
    320,630.90x = 64,307,011,043.90
  5. Step 5: Solve for x
    x = 64,307,011,043.90/320,630.90
  6. Step 6: Final answer
    x = 200,563.99

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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.