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Finding the Fourth Proportional to 634.19, 951.62 and 387.99

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Solution

The fourth proportional to 634.19, 951.62 and 387.99 is: 582.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.19 : 951.62 = 387.99 : x
  2. Step 2: Convert to fraction form
    634.19/951.62 = 387.99/x
  3. Step 3: Cross multiply
    634.19x = 951.62 × 387.99
  4. Step 4: Simplify right side
    634.19x = 369,217.10
  5. Step 5: Solve for x
    x = 369,217.10/634.19
  6. Step 6: Final answer
    x = 582.19

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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.