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Finding the Fourth Proportional to 622.09, 858.18 and 400.97

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Solution

The fourth proportional to 622.09, 858.18 and 400.97 is: 553.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.09 : 858.18 = 400.97 : x
  2. Step 2: Convert to fraction form
    622.09/858.18 = 400.97/x
  3. Step 3: Cross multiply
    622.09x = 858.18 × 400.97
  4. Step 4: Simplify right side
    622.09x = 344,104.43
  5. Step 5: Solve for x
    x = 344,104.43/622.09
  6. Step 6: Final answer
    x = 553.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.