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Finding the Fourth Proportional to 555.21, 832.81 and 225.91

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Solution

The fourth proportional to 555.21, 832.81 and 225.91 is: 338.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.21 : 832.81 = 225.91 : x
  2. Step 2: Convert to fraction form
    555.21/832.81 = 225.91/x
  3. Step 3: Cross multiply
    555.21x = 832.81 × 225.91
  4. Step 4: Simplify right side
    555.21x = 188,141.01
  5. Step 5: Solve for x
    x = 188,141.01/555.21
  6. Step 6: Final answer
    x = 338.86

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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.