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Finding the Fourth Proportional to 328.00, 491.84 and 191.09

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Solution

The fourth proportional to 328.00, 491.84 and 191.09 is: 286.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.00 : 491.84 = 191.09 : x
  2. Step 2: Convert to fraction form
    328.00/491.84 = 191.09/x
  3. Step 3: Cross multiply
    328.00x = 491.84 × 191.09
  4. Step 4: Simplify right side
    328.00x = 93,985.00
  5. Step 5: Solve for x
    x = 93,985.00/328.00
  6. Step 6: Final answer
    x = 286.54

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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.