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Finding the Fourth Proportional to 328.27, 492.71 and 155.04

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Solution

The fourth proportional to 328.27, 492.71 and 155.04 is: 232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.27 : 492.71 = 155.04 : x
  2. Step 2: Convert to fraction form
    328.27/492.71 = 155.04/x
  3. Step 3: Cross multiply
    328.27x = 492.71 × 155.04
  4. Step 4: Simplify right side
    328.27x = 76,389.76
  5. Step 5: Solve for x
    x = 76,389.76/328.27
  6. Step 6: Final answer
    x = 232.70

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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.