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Finding the Fourth Proportional to 328.55, 492.69 and 251.99

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Solution

The fourth proportional to 328.55, 492.69 and 251.99 is: 377.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.55 : 492.69 = 251.99 : x
  2. Step 2: Convert to fraction form
    328.55/492.69 = 251.99/x
  3. Step 3: Cross multiply
    328.55x = 492.69 × 251.99
  4. Step 4: Simplify right side
    328.55x = 124,152.95
  5. Step 5: Solve for x
    x = 124,152.95/328.55
  6. Step 6: Final answer
    x = 377.88

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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.