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Finding the Fourth Proportional to 408.77, 562.71 and 395.45

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Solution

The fourth proportional to 408.77, 562.71 and 395.45 is: 544.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.77 : 562.71 = 395.45 : x
  2. Step 2: Convert to fraction form
    408.77/562.71 = 395.45/x
  3. Step 3: Cross multiply
    408.77x = 562.71 × 395.45
  4. Step 4: Simplify right side
    408.77x = 222,523.67
  5. Step 5: Solve for x
    x = 222,523.67/408.77
  6. Step 6: Final answer
    x = 544.37

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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.