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Finding the Fourth Proportional to 451.56, 623.66 and 303.94

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Solution

The fourth proportional to 451.56, 623.66 and 303.94 is: 419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.56 : 623.66 = 303.94 : x
  2. Step 2: Convert to fraction form
    451.56/623.66 = 303.94/x
  3. Step 3: Cross multiply
    451.56x = 623.66 × 303.94
  4. Step 4: Simplify right side
    451.56x = 189,553.82
  5. Step 5: Solve for x
    x = 189,553.82/451.56
  6. Step 6: Final answer
    x = 419.78

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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.