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Finding the Fourth Proportional to 328.25, 492.02 and 311.16

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Solution

The fourth proportional to 328.25, 492.02 and 311.16 is: 466.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.25 : 492.02 = 311.16 : x
  2. Step 2: Convert to fraction form
    328.25/492.02 = 311.16/x
  3. Step 3: Cross multiply
    328.25x = 492.02 × 311.16
  4. Step 4: Simplify right side
    328.25x = 153,095.88
  5. Step 5: Solve for x
    x = 153,095.88/328.25
  6. Step 6: Final answer
    x = 466.41

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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.