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Finding the Fourth Proportional to 438.39, 605.16 and 263.82

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Solution

The fourth proportional to 438.39, 605.16 and 263.82 is: 364.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.39 : 605.16 = 263.82 : x
  2. Step 2: Convert to fraction form
    438.39/605.16 = 263.82/x
  3. Step 3: Cross multiply
    438.39x = 605.16 × 263.82
  4. Step 4: Simplify right side
    438.39x = 159,653.31
  5. Step 5: Solve for x
    x = 159,653.31/438.39
  6. Step 6: Final answer
    x = 364.18

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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.