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Finding the Fourth Proportional to 454.19, 626.76 and 329.81

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Solution

The fourth proportional to 454.19, 626.76 and 329.81 is: 455.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.19 : 626.76 = 329.81 : x
  2. Step 2: Convert to fraction form
    454.19/626.76 = 329.81/x
  3. Step 3: Cross multiply
    454.19x = 626.76 × 329.81
  4. Step 4: Simplify right side
    454.19x = 206,708.58
  5. Step 5: Solve for x
    x = 206,708.58/454.19
  6. Step 6: Final answer
    x = 455.12

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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.