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Finding the Fourth Proportional to 874.05, 1,206.15 and 481.07

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Solution

The fourth proportional to 874.05, 1,206.15 and 481.07 is: 663.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.05 : 1,206.15 = 481.07 : x
  2. Step 2: Convert to fraction form
    874.05/1,206.15 = 481.07/x
  3. Step 3: Cross multiply
    874.05x = 1,206.15 × 481.07
  4. Step 4: Simplify right side
    874.05x = 580,241.97
  5. Step 5: Solve for x
    x = 580,241.97/874.05
  6. Step 6: Final answer
    x = 663.85

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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.