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Finding the Fourth Proportional to 451.55, 623.09 and 255.02

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Solution

The fourth proportional to 451.55, 623.09 and 255.02 is: 351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.55 : 623.09 = 255.02 : x
  2. Step 2: Convert to fraction form
    451.55/623.09 = 255.02/x
  3. Step 3: Cross multiply
    451.55x = 623.09 × 255.02
  4. Step 4: Simplify right side
    451.55x = 158,900.69
  5. Step 5: Solve for x
    x = 158,900.69/451.55
  6. Step 6: Final answer
    x = 351.90

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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.