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Finding the Fourth Proportional to 271.61, 407.60 and 109.31

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Solution

The fourth proportional to 271.61, 407.60 and 109.31 is: 164.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.61 : 407.60 = 109.31 : x
  2. Step 2: Convert to fraction form
    271.61/407.60 = 109.31/x
  3. Step 3: Cross multiply
    271.61x = 407.60 × 109.31
  4. Step 4: Simplify right side
    271.61x = 44,552.17
  5. Step 5: Solve for x
    x = 44,552.17/271.61
  6. Step 6: Final answer
    x = 164.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.