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Finding the Fourth Proportional to 512.82, 706.85 and 396.18

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Solution

The fourth proportional to 512.82, 706.85 and 396.18 is: 546.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.82 : 706.85 = 396.18 : x
  2. Step 2: Convert to fraction form
    512.82/706.85 = 396.18/x
  3. Step 3: Cross multiply
    512.82x = 706.85 × 396.18
  4. Step 4: Simplify right side
    512.82x = 280,039.83
  5. Step 5: Solve for x
    x = 280,039.83/512.82
  6. Step 6: Final answer
    x = 546.08

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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.