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Finding the Fourth Proportional to 552.08, 760.80 and 396.56

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Solution

The fourth proportional to 552.08, 760.80 and 396.56 is: 546.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.08 : 760.80 = 396.56 : x
  2. Step 2: Convert to fraction form
    552.08/760.80 = 396.56/x
  3. Step 3: Cross multiply
    552.08x = 760.80 × 396.56
  4. Step 4: Simplify right side
    552.08x = 301,702.85
  5. Step 5: Solve for x
    x = 301,702.85/552.08
  6. Step 6: Final answer
    x = 546.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.