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Finding the Fourth Proportional to 874.43, 1,206.77 and 481.53

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Solution

The fourth proportional to 874.43, 1,206.77 and 481.53 is: 664.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.43 : 1,206.77 = 481.53 : x
  2. Step 2: Convert to fraction form
    874.43/1,206.77 = 481.53/x
  3. Step 3: Cross multiply
    874.43x = 1,206.77 × 481.53
  4. Step 4: Simplify right side
    874.43x = 581,095.96
  5. Step 5: Solve for x
    x = 581,095.96/874.43
  6. Step 6: Final answer
    x = 664.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.