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Finding the Fourth Proportional to 552.78, 828.39 and 305.61

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Solution

The fourth proportional to 552.78, 828.39 and 305.61 is: 457.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.78 : 828.39 = 305.61 : x
  2. Step 2: Convert to fraction form
    552.78/828.39 = 305.61/x
  3. Step 3: Cross multiply
    552.78x = 828.39 × 305.61
  4. Step 4: Simplify right side
    552.78x = 253,164.27
  5. Step 5: Solve for x
    x = 253,164.27/552.78
  6. Step 6: Final answer
    x = 457.98

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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.