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Finding the Fourth Proportional to 438.62, 660.72 and 401.27

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Solution

The fourth proportional to 438.62, 660.72 and 401.27 is: 604.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.62 : 660.72 = 401.27 : x
  2. Step 2: Convert to fraction form
    438.62/660.72 = 401.27/x
  3. Step 3: Cross multiply
    438.62x = 660.72 × 401.27
  4. Step 4: Simplify right side
    438.62x = 265,128.77
  5. Step 5: Solve for x
    x = 265,128.77/438.62
  6. Step 6: Final answer
    x = 604.46

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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.