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Finding the Fourth Proportional to 634.88, 952.80 and 392

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Solution

The fourth proportional to 634.88, 952.80 and 392 is: 588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.88 : 952.80 = 392 : x
  2. Step 2: Convert to fraction form
    634.88/952.80 = 392/x
  3. Step 3: Cross multiply
    634.88x = 952.80 × 392
  4. Step 4: Simplify right side
    634.88x = 373,497.60
  5. Step 5: Solve for x
    x = 373,497.60/634.88
  6. Step 6: Final answer
    x = 588.30

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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.