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Finding the Fourth Proportional to 306.66, 459.74 and 133.20

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Solution

The fourth proportional to 306.66, 459.74 and 133.20 is: 199.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.66 : 459.74 = 133.20 : x
  2. Step 2: Convert to fraction form
    306.66/459.74 = 133.20/x
  3. Step 3: Cross multiply
    306.66x = 459.74 × 133.20
  4. Step 4: Simplify right side
    306.66x = 61,236.83
  5. Step 5: Solve for x
    x = 61,236.83/306.66
  6. Step 6: Final answer
    x = 199.69

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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.