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Finding the Fourth Proportional to 451.11, 622.12 and 285.03

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Solution

The fourth proportional to 451.11, 622.12 and 285.03 is: 393.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.11 : 622.12 = 285.03 : x
  2. Step 2: Convert to fraction form
    451.11/622.12 = 285.03/x
  3. Step 3: Cross multiply
    451.11x = 622.12 × 285.03
  4. Step 4: Simplify right side
    451.11x = 177,322.86
  5. Step 5: Solve for x
    x = 177,322.86/451.11
  6. Step 6: Final answer
    x = 393.08

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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.