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Finding the Fourth Proportional to 454.35, 626.87 and 257.81

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Solution

The fourth proportional to 454.35, 626.87 and 257.81 is: 355.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.35 : 626.87 = 257.81 : x
  2. Step 2: Convert to fraction form
    454.35/626.87 = 257.81/x
  3. Step 3: Cross multiply
    454.35x = 626.87 × 257.81
  4. Step 4: Simplify right side
    454.35x = 161,612.07
  5. Step 5: Solve for x
    x = 161,612.07/454.35
  6. Step 6: Final answer
    x = 355.70

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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.