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Finding the Fourth Proportional to 622.25, 858.21 and 482.79

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Solution

The fourth proportional to 622.25, 858.21 and 482.79 is: 665.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.25 : 858.21 = 482.79 : x
  2. Step 2: Convert to fraction form
    622.25/858.21 = 482.79/x
  3. Step 3: Cross multiply
    622.25x = 858.21 × 482.79
  4. Step 4: Simplify right side
    622.25x = 414,335.21
  5. Step 5: Solve for x
    x = 414,335.21/622.25
  6. Step 6: Final answer
    x = 665.87

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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.