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Finding the Fourth Proportional to 874.94, 1,207.43 and 481.98

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Solution

The fourth proportional to 874.94, 1,207.43 and 481.98 is: 665.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.94 : 1,207.43 = 481.98 : x
  2. Step 2: Convert to fraction form
    874.94/1,207.43 = 481.98/x
  3. Step 3: Cross multiply
    874.94x = 1,207.43 × 481.98
  4. Step 4: Simplify right side
    874.94x = 581,954.70
  5. Step 5: Solve for x
    x = 581,954.70/874.94
  6. Step 6: Final answer
    x = 665.14

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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.