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Finding the Fourth Proportional to 328.02, 491.63 and 219.48

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Solution

The fourth proportional to 328.02, 491.63 and 219.48 is: 328.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.02 : 491.63 = 219.48 : x
  2. Step 2: Convert to fraction form
    328.02/491.63 = 219.48/x
  3. Step 3: Cross multiply
    328.02x = 491.63 × 219.48
  4. Step 4: Simplify right side
    328.02x = 107,901.86
  5. Step 5: Solve for x
    x = 107,901.86/328.02
  6. Step 6: Final answer
    x = 328.95

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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.