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Finding the Fourth Proportional to 328.68, 493.19 and 123.39

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Solution

The fourth proportional to 328.68, 493.19 and 123.39 is: 185.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.68 : 493.19 = 123.39 : x
  2. Step 2: Convert to fraction form
    328.68/493.19 = 123.39/x
  3. Step 3: Cross multiply
    328.68x = 493.19 × 123.39
  4. Step 4: Simplify right side
    328.68x = 60,851.63
  5. Step 5: Solve for x
    x = 60,851.63/328.68
  6. Step 6: Final answer
    x = 185.14

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.