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Finding the Fourth Proportional to 451.59, 623.18 and 255.15

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Solution

The fourth proportional to 451.59, 623.18 and 255.15 is: 352.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.59 : 623.18 = 255.15 : x
  2. Step 2: Convert to fraction form
    451.59/623.18 = 255.15/x
  3. Step 3: Cross multiply
    451.59x = 623.18 × 255.15
  4. Step 4: Simplify right side
    451.59x = 159,003.10
  5. Step 5: Solve for x
    x = 159,003.10/451.59
  6. Step 6: Final answer
    x = 352.10

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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.