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Finding the Fourth Proportional to 451.72, 623.20 and 255.18

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Solution

The fourth proportional to 451.72, 623.20 and 255.18 is: 352.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.72 : 623.20 = 255.18 : x
  2. Step 2: Convert to fraction form
    451.72/623.20 = 255.18/x
  3. Step 3: Cross multiply
    451.72x = 623.20 × 255.18
  4. Step 4: Simplify right side
    451.72x = 159,028.18
  5. Step 5: Solve for x
    x = 159,028.18/451.72
  6. Step 6: Final answer
    x = 352.05

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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.