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Finding the Fourth Proportional to 303.89, 419.60 and 303.29

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Solution

The fourth proportional to 303.89, 419.60 and 303.29 is: 418.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.89 : 419.60 = 303.29 : x
  2. Step 2: Convert to fraction form
    303.89/419.60 = 303.29/x
  3. Step 3: Cross multiply
    303.89x = 419.60 × 303.29
  4. Step 4: Simplify right side
    303.89x = 127,259.14
  5. Step 5: Solve for x
    x = 127,259.14/303.89
  6. Step 6: Final answer
    x = 418.76

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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.