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Finding the Fourth Proportional to 402.49, 555.34 and 227.77

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Solution

The fourth proportional to 402.49, 555.34 and 227.77 is: 314.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.49 : 555.34 = 227.77 : x
  2. Step 2: Convert to fraction form
    402.49/555.34 = 227.77/x
  3. Step 3: Cross multiply
    402.49x = 555.34 × 227.77
  4. Step 4: Simplify right side
    402.49x = 126,489.79
  5. Step 5: Solve for x
    x = 126,489.79/402.49
  6. Step 6: Final answer
    x = 314.27

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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.