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Finding the Fourth Proportional to 271.72, 374.79 and 213.40

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Solution

The fourth proportional to 271.72, 374.79 and 213.40 is: 294.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.72 : 374.79 = 213.40 : x
  2. Step 2: Convert to fraction form
    271.72/374.79 = 213.40/x
  3. Step 3: Cross multiply
    271.72x = 374.79 × 213.40
  4. Step 4: Simplify right side
    271.72x = 79,980.19
  5. Step 5: Solve for x
    x = 79,980.19/271.72
  6. Step 6: Final answer
    x = 294.35

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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.