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Finding the Fourth Proportional to 451.06, 676.57 and 142.87

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Solution

The fourth proportional to 451.06, 676.57 and 142.87 is: 214.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.06 : 676.57 = 142.87 : x
  2. Step 2: Convert to fraction form
    451.06/676.57 = 142.87/x
  3. Step 3: Cross multiply
    451.06x = 676.57 × 142.87
  4. Step 4: Simplify right side
    451.06x = 96,661.56
  5. Step 5: Solve for x
    x = 96,661.56/451.06
  6. Step 6: Final answer
    x = 214.30

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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.