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Finding the Fourth Proportional to 438.44, 605.30 and 291.27

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Solution

The fourth proportional to 438.44, 605.30 and 291.27 is: 402.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.44 : 605.30 = 291.27 : x
  2. Step 2: Convert to fraction form
    438.44/605.30 = 291.27/x
  3. Step 3: Cross multiply
    438.44x = 605.30 × 291.27
  4. Step 4: Simplify right side
    438.44x = 176,304.27
  5. Step 5: Solve for x
    x = 176,304.27/438.44
  6. Step 6: Final answer
    x = 402.12

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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.