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Finding the Fourth Proportional to 622.85, 859.62 and 357.37

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Solution

The fourth proportional to 622.85, 859.62 and 357.37 is: 493.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.85 : 859.62 = 357.37 : x
  2. Step 2: Convert to fraction form
    622.85/859.62 = 357.37/x
  3. Step 3: Cross multiply
    622.85x = 859.62 × 357.37
  4. Step 4: Simplify right side
    622.85x = 307,202.40
  5. Step 5: Solve for x
    x = 307,202.40/622.85
  6. Step 6: Final answer
    x = 493.22

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