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Finding the Fourth Proportional to 451.88, 623.55 and 255.43

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Solution

The fourth proportional to 451.88, 623.55 and 255.43 is: 352.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.88 : 623.55 = 255.43 : x
  2. Step 2: Convert to fraction form
    451.88/623.55 = 255.43/x
  3. Step 3: Cross multiply
    451.88x = 623.55 × 255.43
  4. Step 4: Simplify right side
    451.88x = 159,273.38
  5. Step 5: Solve for x
    x = 159,273.38/451.88
  6. Step 6: Final answer
    x = 352.47

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Double scale
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1.5x scale

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.