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Finding the Fourth Proportional to 451.35, 622.85 and 303.75

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Solution

The fourth proportional to 451.35, 622.85 and 303.75 is: 419.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.35 : 622.85 = 303.75 : x
  2. Step 2: Convert to fraction form
    451.35/622.85 = 303.75/x
  3. Step 3: Cross multiply
    451.35x = 622.85 × 303.75
  4. Step 4: Simplify right side
    451.35x = 189,189.17
  5. Step 5: Solve for x
    x = 189,189.17/451.35
  6. Step 6: Final answer
    x = 419.16

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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.