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Finding the Fourth Proportional to 328.31, 492.69 and 135.94

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Solution

The fourth proportional to 328.31, 492.69 and 135.94 is: 204.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.31 : 492.69 = 135.94 : x
  2. Step 2: Convert to fraction form
    328.31/492.69 = 135.94/x
  3. Step 3: Cross multiply
    328.31x = 492.69 × 135.94
  4. Step 4: Simplify right side
    328.31x = 66,976.28
  5. Step 5: Solve for x
    x = 66,976.28/328.31
  6. Step 6: Final answer
    x = 204.00

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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.