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Finding the Fourth Proportional to 333.30, 499.60 and 138.08

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Solution

The fourth proportional to 333.30, 499.60 and 138.08 is: 206.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.30 : 499.60 = 138.08 : x
  2. Step 2: Convert to fraction form
    333.30/499.60 = 138.08/x
  3. Step 3: Cross multiply
    333.30x = 499.60 × 138.08
  4. Step 4: Simplify right side
    333.30x = 68,984.77
  5. Step 5: Solve for x
    x = 68,984.77/333.30
  6. Step 6: Final answer
    x = 206.98

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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.