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Finding the Fourth Proportional to 451.60, 623.20 and 255.12

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Solution

The fourth proportional to 451.60, 623.20 and 255.12 is: 352.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.60 : 623.20 = 255.12 : x
  2. Step 2: Convert to fraction form
    451.60/623.20 = 255.12/x
  3. Step 3: Cross multiply
    451.60x = 623.20 × 255.12
  4. Step 4: Simplify right side
    451.60x = 158,990.78
  5. Step 5: Solve for x
    x = 158,990.78/451.60
  6. Step 6: Final answer
    x = 352.06

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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.