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Finding the Fourth Proportional to 451.66, 622.75 and 385.26

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Solution

The fourth proportional to 451.66, 622.75 and 385.26 is: 531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.66 : 622.75 = 385.26 : x
  2. Step 2: Convert to fraction form
    451.66/622.75 = 385.26/x
  3. Step 3: Cross multiply
    451.66x = 622.75 × 385.26
  4. Step 4: Simplify right side
    451.66x = 239,920.67
  5. Step 5: Solve for x
    x = 239,920.67/451.66
  6. Step 6: Final answer
    x = 531.20

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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.