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Finding the Fourth Proportional to 303.28, 418.96 and 240.90

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Solution

The fourth proportional to 303.28, 418.96 and 240.90 is: 332.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.28 : 418.96 = 240.90 : x
  2. Step 2: Convert to fraction form
    303.28/418.96 = 240.90/x
  3. Step 3: Cross multiply
    303.28x = 418.96 × 240.90
  4. Step 4: Simplify right side
    303.28x = 100,927.46
  5. Step 5: Solve for x
    x = 100,927.46/303.28
  6. Step 6: Final answer
    x = 332.79

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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.