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Finding the Fourth Proportional to 271.42, 407.33 and 168.86

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Solution

The fourth proportional to 271.42, 407.33 and 168.86 is: 253.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.42 : 407.33 = 168.86 : x
  2. Step 2: Convert to fraction form
    271.42/407.33 = 168.86/x
  3. Step 3: Cross multiply
    271.42x = 407.33 × 168.86
  4. Step 4: Simplify right side
    271.42x = 68,779.71
  5. Step 5: Solve for x
    x = 68,779.71/271.42
  6. Step 6: Final answer
    x = 253.41

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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.