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Finding the Fourth Proportional to 622.89, 858.99 and 475.27

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Solution

The fourth proportional to 622.89, 858.99 and 475.27 is: 655.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.89 : 858.99 = 475.27 : x
  2. Step 2: Convert to fraction form
    622.89/858.99 = 475.27/x
  3. Step 3: Cross multiply
    622.89x = 858.99 × 475.27
  4. Step 4: Simplify right side
    622.89x = 408,251.81
  5. Step 5: Solve for x
    x = 408,251.81/622.89
  6. Step 6: Final answer
    x = 655.42

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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.