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Finding the Fourth Proportional to 671.10, 925.47 and 438.18

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Solution

The fourth proportional to 671.10, 925.47 and 438.18 is: 604.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.10 : 925.47 = 438.18 : x
  2. Step 2: Convert to fraction form
    671.10/925.47 = 438.18/x
  3. Step 3: Cross multiply
    671.10x = 925.47 × 438.18
  4. Step 4: Simplify right side
    671.10x = 405,522.44
  5. Step 5: Solve for x
    x = 405,522.44/671.10
  6. Step 6: Final answer
    x = 604.27

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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.