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Finding the Fourth Proportional to 874.70, 1,207.11 and 481.73

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Solution

The fourth proportional to 874.70, 1,207.11 and 481.73 is: 664.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.70 : 1,207.11 = 481.73 : x
  2. Step 2: Convert to fraction form
    874.70/1,207.11 = 481.73/x
  3. Step 3: Cross multiply
    874.70x = 1,207.11 × 481.73
  4. Step 4: Simplify right side
    874.70x = 581,495.06
  5. Step 5: Solve for x
    x = 581,495.06/874.70
  6. Step 6: Final answer
    x = 664.80

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Double scale
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1.5x scale

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.