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Finding the Fourth Proportional to 552.50, 828.20 and 278.18

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Solution

The fourth proportional to 552.50, 828.20 and 278.18 is: 416.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.50 : 828.20 = 278.18 : x
  2. Step 2: Convert to fraction form
    552.50/828.20 = 278.18/x
  3. Step 3: Cross multiply
    552.50x = 828.20 × 278.18
  4. Step 4: Simplify right side
    552.50x = 230,388.68
  5. Step 5: Solve for x
    x = 230,388.68/552.50
  6. Step 6: Final answer
    x = 416.99

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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.