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Finding the Fourth Proportional to 622.08, 858.06 and 401.31

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Solution

The fourth proportional to 622.08, 858.06 and 401.31 is: 553.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.08 : 858.06 = 401.31 : x
  2. Step 2: Convert to fraction form
    622.08/858.06 = 401.31/x
  3. Step 3: Cross multiply
    622.08x = 858.06 × 401.31
  4. Step 4: Simplify right side
    622.08x = 344,348.06
  5. Step 5: Solve for x
    x = 344,348.06/622.08
  6. Step 6: Final answer
    x = 553.54

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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.