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Finding the Fourth Proportional to 439.50, 604.62 and 390.27

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Solution

The fourth proportional to 439.50, 604.62 and 390.27 is: 536.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.50 : 604.62 = 390.27 : x
  2. Step 2: Convert to fraction form
    439.50/604.62 = 390.27/x
  3. Step 3: Cross multiply
    439.50x = 604.62 × 390.27
  4. Step 4: Simplify right side
    439.50x = 235,965.05
  5. Step 5: Solve for x
    x = 235,965.05/439.50
  6. Step 6: Final answer
    x = 536.89

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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.