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Finding the Fourth Proportional to 328.80, 493.18 and 146.14

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Solution

The fourth proportional to 328.80, 493.18 and 146.14 is: 219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.80 : 493.18 = 146.14 : x
  2. Step 2: Convert to fraction form
    328.80/493.18 = 146.14/x
  3. Step 3: Cross multiply
    328.80x = 493.18 × 146.14
  4. Step 4: Simplify right side
    328.80x = 72,073.33
  5. Step 5: Solve for x
    x = 72,073.33/328.80
  6. Step 6: Final answer
    x = 219.20

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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.