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Finding the Fourth Proportional to 320,740.92, 481,271.76 and 143,375.22

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Solution

The fourth proportional to 320,740.92, 481,271.76 and 143,375.22 is: 215,134.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,740.92 : 481,271.76 = 143,375.22 : x
  2. Step 2: Convert to fraction form
    320,740.92/481,271.76 = 143,375.22/x
  3. Step 3: Cross multiply
    320,740.92x = 481,271.76 × 143,375.22
  4. Step 4: Simplify right side
    320,740.92x = 69,002,444,469.79
  5. Step 5: Solve for x
    x = 69,002,444,469.79/320,740.92
  6. Step 6: Final answer
    x = 215,134.52

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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.