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Finding the Fourth Proportional to 451, 622.38 and 303.40

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Solution

The fourth proportional to 451, 622.38 and 303.40 is: 418.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    451 : 622.38 = 303.40 : x
  2. Step 2: Convert to fraction form
    451/622.38 = 303.40/x
  3. Step 3: Cross multiply
    451x = 622.38 × 303.40
  4. Step 4: Simplify right side
    451x = 188,830.09
  5. Step 5: Solve for x
    x = 188,830.09/451
  6. Step 6: Final answer
    x = 418.69

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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.