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Finding the Fourth Proportional to 552.48, 828.72 and 278.49

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Solution

The fourth proportional to 552.48, 828.72 and 278.49 is: 417.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.48 : 828.72 = 278.49 : x
  2. Step 2: Convert to fraction form
    552.48/828.72 = 278.49/x
  3. Step 3: Cross multiply
    552.48x = 828.72 × 278.49
  4. Step 4: Simplify right side
    552.48x = 230,790.23
  5. Step 5: Solve for x
    x = 230,790.23/552.48
  6. Step 6: Final answer
    x = 417.74

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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.