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Finding the Fourth Proportional to 622.69, 934.03 and 407.63

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Solution

The fourth proportional to 622.69, 934.03 and 407.63 is: 611.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.69 : 934.03 = 407.63 : x
  2. Step 2: Convert to fraction form
    622.69/934.03 = 407.63/x
  3. Step 3: Cross multiply
    622.69x = 934.03 × 407.63
  4. Step 4: Simplify right side
    622.69x = 380,738.65
  5. Step 5: Solve for x
    x = 380,738.65/622.69
  6. Step 6: Final answer
    x = 611.44

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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.