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Finding the Fourth Proportional to 289.27, 399.62 and 227.10

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Solution

The fourth proportional to 289.27, 399.62 and 227.10 is: 313.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.27 : 399.62 = 227.10 : x
  2. Step 2: Convert to fraction form
    289.27/399.62 = 227.10/x
  3. Step 3: Cross multiply
    289.27x = 399.62 × 227.10
  4. Step 4: Simplify right side
    289.27x = 90,752.57
  5. Step 5: Solve for x
    x = 90,752.57/289.27
  6. Step 6: Final answer
    x = 313.74

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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.