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Finding the Fourth Proportional to 356.27, 534.57 and 211.99

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Solution

The fourth proportional to 356.27, 534.57 and 211.99 is: 318.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.27 : 534.57 = 211.99 : x
  2. Step 2: Convert to fraction form
    356.27/534.57 = 211.99/x
  3. Step 3: Cross multiply
    356.27x = 534.57 × 211.99
  4. Step 4: Simplify right side
    356.27x = 113,325.66
  5. Step 5: Solve for x
    x = 113,325.66/356.27
  6. Step 6: Final answer
    x = 318.09

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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.