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Finding the Fourth Proportional to 402.20, 554.95 and 227.51

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Solution

The fourth proportional to 402.20, 554.95 and 227.51 is: 313.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.20 : 554.95 = 227.51 : x
  2. Step 2: Convert to fraction form
    402.20/554.95 = 227.51/x
  3. Step 3: Cross multiply
    402.20x = 554.95 × 227.51
  4. Step 4: Simplify right side
    402.20x = 126,256.67
  5. Step 5: Solve for x
    x = 126,256.67/402.20
  6. Step 6: Final answer
    x = 313.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.