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Finding the Fourth Proportional to 306.53, 459.40 and 133.15

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Solution

The fourth proportional to 306.53, 459.40 and 133.15 is: 199.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.53 : 459.40 = 133.15 : x
  2. Step 2: Convert to fraction form
    306.53/459.40 = 133.15/x
  3. Step 3: Cross multiply
    306.53x = 459.40 × 133.15
  4. Step 4: Simplify right side
    306.53x = 61,166.15
  5. Step 5: Solve for x
    x = 61,166.15/306.53
  6. Step 6: Final answer
    x = 199.54

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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.