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Finding the Fourth Proportional to 511.94, 706.74 and 395.66

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Solution

The fourth proportional to 511.94, 706.74 and 395.66 is: 546.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.94 : 706.74 = 395.66 : x
  2. Step 2: Convert to fraction form
    511.94/706.74 = 395.66/x
  3. Step 3: Cross multiply
    511.94x = 706.74 × 395.66
  4. Step 4: Simplify right side
    511.94x = 279,628.75
  5. Step 5: Solve for x
    x = 279,628.75/511.94
  6. Step 6: Final answer
    x = 546.21

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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.