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Finding the Fourth Proportional to 304.69, 456.81 and 213.55

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Solution

The fourth proportional to 304.69, 456.81 and 213.55 is: 320.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.69 : 456.81 = 213.55 : x
  2. Step 2: Convert to fraction form
    304.69/456.81 = 213.55/x
  3. Step 3: Cross multiply
    304.69x = 456.81 × 213.55
  4. Step 4: Simplify right side
    304.69x = 97,551.78
  5. Step 5: Solve for x
    x = 97,551.78/304.69
  6. Step 6: Final answer
    x = 320.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.