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Finding the Fourth Proportional to 451.67, 676.89 and 288.99

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Solution

The fourth proportional to 451.67, 676.89 and 288.99 is: 433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.67 : 676.89 = 288.99 : x
  2. Step 2: Convert to fraction form
    451.67/676.89 = 288.99/x
  3. Step 3: Cross multiply
    451.67x = 676.89 × 288.99
  4. Step 4: Simplify right side
    451.67x = 195,614.44
  5. Step 5: Solve for x
    x = 195,614.44/451.67
  6. Step 6: Final answer
    x = 433.10

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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.