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Finding the Fourth Proportional to 399.27, 549.79 and 333.66

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Solution

The fourth proportional to 399.27, 549.79 and 333.66 is: 459.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.27 : 549.79 = 333.66 : x
  2. Step 2: Convert to fraction form
    399.27/549.79 = 333.66/x
  3. Step 3: Cross multiply
    399.27x = 549.79 × 333.66
  4. Step 4: Simplify right side
    399.27x = 183,442.93
  5. Step 5: Solve for x
    x = 183,442.93/399.27
  6. Step 6: Final answer
    x = 459.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.