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Finding the Fourth Proportional to 454.37, 626.92 and 257.86

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Solution

The fourth proportional to 454.37, 626.92 and 257.86 is: 355.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.37 : 626.92 = 257.86 : x
  2. Step 2: Convert to fraction form
    454.37/626.92 = 257.86/x
  3. Step 3: Cross multiply
    454.37x = 626.92 × 257.86
  4. Step 4: Simplify right side
    454.37x = 161,657.59
  5. Step 5: Solve for x
    x = 161,657.59/454.37
  6. Step 6: Final answer
    x = 355.78

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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.