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Finding the Fourth Proportional to 284.96, 393.76 and 227.20

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Solution

The fourth proportional to 284.96, 393.76 and 227.20 is: 313.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.96 : 393.76 = 227.20 : x
  2. Step 2: Convert to fraction form
    284.96/393.76 = 227.20/x
  3. Step 3: Cross multiply
    284.96x = 393.76 × 227.20
  4. Step 4: Simplify right side
    284.96x = 89,462.27
  5. Step 5: Solve for x
    x = 89,462.27/284.96
  6. Step 6: Final answer
    x = 313.95

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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.