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Finding the Fourth Proportional to 328.59, 490.49 and 303.08

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Solution

The fourth proportional to 328.59, 490.49 and 303.08 is: 452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.59 : 490.49 = 303.08 : x
  2. Step 2: Convert to fraction form
    328.59/490.49 = 303.08/x
  3. Step 3: Cross multiply
    328.59x = 490.49 × 303.08
  4. Step 4: Simplify right side
    328.59x = 148,654.88
  5. Step 5: Solve for x
    x = 148,654.88/328.59
  6. Step 6: Final answer
    x = 452.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.