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Finding the Fourth Proportional to 451.97, 623.70 and 252.80

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Solution

The fourth proportional to 451.97, 623.70 and 252.80 is: 348.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.97 : 623.70 = 252.80 : x
  2. Step 2: Convert to fraction form
    451.97/623.70 = 252.80/x
  3. Step 3: Cross multiply
    451.97x = 623.70 × 252.80
  4. Step 4: Simplify right side
    451.97x = 157,671.36
  5. Step 5: Solve for x
    x = 157,671.36/451.97
  6. Step 6: Final answer
    x = 348.85

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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.