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Finding the Fourth Proportional to 622.69, 934.29 and 439.69

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Solution

The fourth proportional to 622.69, 934.29 and 439.69 is: 659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.69 : 934.29 = 439.69 : x
  2. Step 2: Convert to fraction form
    622.69/934.29 = 439.69/x
  3. Step 3: Cross multiply
    622.69x = 934.29 × 439.69
  4. Step 4: Simplify right side
    622.69x = 410,797.97
  5. Step 5: Solve for x
    x = 410,797.97/622.69
  6. Step 6: Final answer
    x = 659.72

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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.