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Finding the Fourth Proportional to 622.70, 925.01 and 611.90

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Solution

The fourth proportional to 622.70, 925.01 and 611.90 is: 908.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.70 : 925.01 = 611.90 : x
  2. Step 2: Convert to fraction form
    622.70/925.01 = 611.90/x
  3. Step 3: Cross multiply
    622.70x = 925.01 × 611.90
  4. Step 4: Simplify right side
    622.70x = 566,013.62
  5. Step 5: Solve for x
    x = 566,013.62/622.70
  6. Step 6: Final answer
    x = 908.97

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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.