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Finding the Fourth Proportional to 622.62, 928.13 and 611.69

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Solution

The fourth proportional to 622.62, 928.13 and 611.69 is: 911.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.62 : 928.13 = 611.69 : x
  2. Step 2: Convert to fraction form
    622.62/928.13 = 611.69/x
  3. Step 3: Cross multiply
    622.62x = 928.13 × 611.69
  4. Step 4: Simplify right side
    622.62x = 567,720.14
  5. Step 5: Solve for x
    x = 567,720.14/622.62
  6. Step 6: Final answer
    x = 911.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.