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Finding the Fourth Proportional to 271.79, 407.39 and 117.85

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Solution

The fourth proportional to 271.79, 407.39 and 117.85 is: 176.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.79 : 407.39 = 117.85 : x
  2. Step 2: Convert to fraction form
    271.79/407.39 = 117.85/x
  3. Step 3: Cross multiply
    271.79x = 407.39 × 117.85
  4. Step 4: Simplify right side
    271.79x = 48,009.30
  5. Step 5: Solve for x
    x = 48,009.30/271.79
  6. Step 6: Final answer
    x = 176.64

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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.