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Finding the Fourth Proportional to 328.04, 492.74 and 276.78

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Solution

The fourth proportional to 328.04, 492.74 and 276.78 is: 415.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.04 : 492.74 = 276.78 : x
  2. Step 2: Convert to fraction form
    328.04/492.74 = 276.78/x
  3. Step 3: Cross multiply
    328.04x = 492.74 × 276.78
  4. Step 4: Simplify right side
    328.04x = 136,380.92
  5. Step 5: Solve for x
    x = 136,380.92/328.04
  6. Step 6: Final answer
    x = 415.75

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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.