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Finding the Fourth Proportional to 328.78, 492.85 and 184.20

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Solution

The fourth proportional to 328.78, 492.85 and 184.20 is: 276.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.78 : 492.85 = 184.20 : x
  2. Step 2: Convert to fraction form
    328.78/492.85 = 184.20/x
  3. Step 3: Cross multiply
    328.78x = 492.85 × 184.20
  4. Step 4: Simplify right side
    328.78x = 90,782.97
  5. Step 5: Solve for x
    x = 90,782.97/328.78
  6. Step 6: Final answer
    x = 276.12

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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.