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Finding the Fourth Proportional to 622.60, 858.72 and 482.56

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Solution

The fourth proportional to 622.60, 858.72 and 482.56 is: 665.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.60 : 858.72 = 482.56 : x
  2. Step 2: Convert to fraction form
    622.60/858.72 = 482.56/x
  3. Step 3: Cross multiply
    622.60x = 858.72 × 482.56
  4. Step 4: Simplify right side
    622.60x = 414,383.92
  5. Step 5: Solve for x
    x = 414,383.92/622.60
  6. Step 6: Final answer
    x = 665.57

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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.