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Finding the Fourth Proportional to 552.50, 828.90 and 167.78

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Solution

The fourth proportional to 552.50, 828.90 and 167.78 is: 251.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.50 : 828.90 = 167.78 : x
  2. Step 2: Convert to fraction form
    552.50/828.90 = 167.78/x
  3. Step 3: Cross multiply
    552.50x = 828.90 × 167.78
  4. Step 4: Simplify right side
    552.50x = 139,072.84
  5. Step 5: Solve for x
    x = 139,072.84/552.50
  6. Step 6: Final answer
    x = 251.72

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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.