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Finding the Fourth Proportional to 451.59, 623.20 and 255.10

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Solution

The fourth proportional to 451.59, 623.20 and 255.10 is: 352.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.59 : 623.20 = 255.10 : x
  2. Step 2: Convert to fraction form
    451.59/623.20 = 255.10/x
  3. Step 3: Cross multiply
    451.59x = 623.20 × 255.10
  4. Step 4: Simplify right side
    451.59x = 158,978.60
  5. Step 5: Solve for x
    x = 158,978.60/451.59
  6. Step 6: Final answer
    x = 352.04

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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.