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Finding the Fourth Proportional to 330.60, 494.58 and 186.42

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Solution

The fourth proportional to 330.60, 494.58 and 186.42 is: 278.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.60 : 494.58 = 186.42 : x
  2. Step 2: Convert to fraction form
    330.60/494.58 = 186.42/x
  3. Step 3: Cross multiply
    330.60x = 494.58 × 186.42
  4. Step 4: Simplify right side
    330.60x = 92,199.60
  5. Step 5: Solve for x
    x = 92,199.60/330.60
  6. Step 6: Final answer
    x = 278.89

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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.