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Finding the Fourth Proportional to 328.52, 491.97 and 191.13

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Solution

The fourth proportional to 328.52, 491.97 and 191.13 is: 286.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.52 : 491.97 = 191.13 : x
  2. Step 2: Convert to fraction form
    328.52/491.97 = 191.13/x
  3. Step 3: Cross multiply
    328.52x = 491.97 × 191.13
  4. Step 4: Simplify right side
    328.52x = 94,030.23
  5. Step 5: Solve for x
    x = 94,030.23/328.52
  6. Step 6: Final answer
    x = 286.23

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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.