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Finding the Fourth Proportional to 451.55, 623.13 and 255.05

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Solution

The fourth proportional to 451.55, 623.13 and 255.05 is: 351.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.55 : 623.13 = 255.05 : x
  2. Step 2: Convert to fraction form
    451.55/623.13 = 255.05/x
  3. Step 3: Cross multiply
    451.55x = 623.13 × 255.05
  4. Step 4: Simplify right side
    451.55x = 158,924.92
  5. Step 5: Solve for x
    x = 158,924.92/451.55
  6. Step 6: Final answer
    x = 351.96

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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.