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Finding the Fourth Proportional to 402.54, 555.53 and 225.51

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Solution

The fourth proportional to 402.54, 555.53 and 225.51 is: 311.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.54 : 555.53 = 225.51 : x
  2. Step 2: Convert to fraction form
    402.54/555.53 = 225.51/x
  3. Step 3: Cross multiply
    402.54x = 555.53 × 225.51
  4. Step 4: Simplify right side
    402.54x = 125,276.44
  5. Step 5: Solve for x
    x = 125,276.44/402.54
  6. Step 6: Final answer
    x = 311.22

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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.