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Finding the Fourth Proportional to 320,631.40, 481,119.90 and 133,661.80

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Solution

The fourth proportional to 320,631.40, 481,119.90 and 133,661.80 is: 200,564.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,631.40 : 481,119.90 = 133,661.80 : x
  2. Step 2: Convert to fraction form
    320,631.40/481,119.90 = 133,661.80/x
  3. Step 3: Cross multiply
    320,631.40x = 481,119.90 × 133,661.80
  4. Step 4: Simplify right side
    320,631.40x = 64,307,351,849.82
  5. Step 5: Solve for x
    x = 64,307,351,849.82/320,631.40
  6. Step 6: Final answer
    x = 200,564.74

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1.5x scale

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.